61141240 has 32 divisors (see below), whose sum is σ = 144810000. Its totient is φ = 23169024.

The previous prime is 61141211. The next prime is 61141247. The reversal of 61141240 is 4214116.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61141247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39465 + ... + 40984.

Almost surely, 2^61141240 is an apocalyptic number.

It is an amenable number.

61141240 is an abundant number, since it is smaller than the sum of its proper divisors (83668760).

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

61141240 is a wasteful number, since it uses less digits than its factorization.

61141240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80479 (or 80475 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 61141240 is about 7819.2864124548. The cubic root of 61141240 is about 393.9533042652.

Adding to 61141240 its reverse (4214116), we get a palindrome (65355356).

The spelling of 61141240 in words is "sixty-one million, one hundred forty-one thousand, two hundred forty".