61001240 has 16 divisors (see below), whose sum is σ = 137252880. Its totient is φ = 24400480.

The previous prime is 61001233. The next prime is 61001243. The reversal of 61001240 is 4210016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61001243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 762476 + ... + 762555.

It is an arithmetic number, because the mean of its divisors is an integer number (8578305).

Almost surely, 2^61001240 is an apocalyptic number.

It is an amenable number.

61001240 is an abundant number, since it is smaller than the sum of its proper divisors (76251640).

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

61001240 is a wasteful number, since it uses less digits than its factorization.

61001240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1525042 (or 1525038 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 61001240 is about 7810.3290583688. The cubic root of 61001240 is about 393.6523856454.

Adding to 61001240 its reverse (4210016), we get a palindrome (65211256).

The spelling of 61001240 in words is "sixty-one million, one thousand, two hundred forty".