61415140 has 24 divisors (see below), whose sum is σ = 129769920. Its totient is φ = 24414048.

The previous prime is 61415131. The next prime is 61415141. The reversal of 61415140 is 4151416.

It is not an unprimeable number, because it can be changed into a prime (61415141) 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, 6160 + ... + 12679.

It is an arithmetic number, because the mean of its divisors is an integer number (5407080).

Almost surely, 2^61415140 is an apocalyptic number.

It is an amenable number.

61415140 is an abundant number, since it is smaller than the sum of its proper divisors (68354780).

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

61415140 is a wasteful number, since it uses less digits than its factorization.

61415140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19011 (or 19009 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 61415140 is about 7836.7812270090. The cubic root of 61415140 is about 394.5407041992.

Adding to 61415140 its reverse (4151416), we get a palindrome (65566556).

The spelling of 61415140 in words is "sixty-one million, four hundred fifteen thousand, one hundred forty".