61539842 has 32 divisors (see below), whose sum is σ = 114307200. Its totient is φ = 24196608.

The previous prime is 61539839. The next prime is 61539853. The reversal of 61539842 is 24893516.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 61539796 and 61539805.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31634 + ... + 33522.

It is an arithmetic number, because the mean of its divisors is an integer number (3572100).

Almost surely, 2^61539842 is an apocalyptic number.

61539842 is a deficient number, since it is larger than the sum of its proper divisors (52767358).

61539842 is a wasteful number, since it uses less digits than its factorization.

61539842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2090.

The product of its digits is 51840, while the sum is 38.

The square root of 61539842 is about 7844.7333925380. The cubic root of 61539842 is about 394.8075588791.

The spelling of 61539842 in words is "sixty-one million, five hundred thirty-nine thousand, eight hundred forty-two".