61497642 has 32 divisors (see below), whose sum is σ = 129830400. Its totient is φ = 19366128.

The previous prime is 61497641. The next prime is 61497659. The reversal of 61497642 is 24679416.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 61497642.

It is not an unprimeable number, because it can be changed into a prime (61497641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66459 + ... + 67377.

It is an arithmetic number, because the mean of its divisors is an integer number (4057200).

Almost surely, 2^61497642 is an apocalyptic number.

61497642 is an abundant number, since it is smaller than the sum of its proper divisors (68332758).

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

61497642 is a wasteful number, since it uses less digits than its factorization.

61497642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1530.

The product of its digits is 72576, while the sum is 39.

The square root of 61497642 is about 7842.0432286490. The cubic root of 61497642 is about 394.7172938399.

The spelling of 61497642 in words is "sixty-one million, four hundred ninety-seven thousand, six hundred forty-two".