61241040 has 240 divisors, whose sum is σ = 243734400. Its totient is φ = 13483008.

The previous prime is 61241039. The next prime is 61241041. The reversal of 61241040 is 4014216.

61241040 is a `hidden beast` number, since 612 + 4 + 10 + 40 = 666.

It is an interprime number because it is at equal distance from previous prime (61241039) and next prime (61241041).

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61241041) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 145951 + ... + 146369.

It is an arithmetic number, because the mean of its divisors is an integer number (1015560).

Almost surely, 2^61241040 is an apocalyptic number.

61241040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61241040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121867200).

61241040 is an abundant number, since it is smaller than the sum of its proper divisors (182493360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61241040 is a wasteful number, since it uses less digits than its factorization.

61241040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474 (or 465 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 61241040 is about 7825.6654669108. The cubic root of 61241040 is about 394.1675359208.

Adding to 61241040 its reverse (4014216), we get a palindrome (65255256).

The spelling of 61241040 in words is "sixty-one million, two hundred forty-one thousand, forty".