61139042 has 4 divisors (see below), whose sum is σ = 91708566. Its totient is φ = 30569520.

The previous prime is 61139027. The next prime is 61139053. The reversal of 61139042 is 24093116.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 55517401 + 5621641 = 7451^2 + 2371^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15284759 + ... + 15284762.

Almost surely, 2^61139042 is an apocalyptic number.

61139042 is a deficient number, since it is larger than the sum of its proper divisors (30569524).

61139042 is a wasteful number, since it uses less digits than its factorization.

61139042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30569523.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 61139042 is about 7819.1458612818. The cubic root of 61139042 is about 393.9485833941.

The spelling of 61139042 in words is "sixty-one million, one hundred thirty-nine thousand, forty-two".