61388042 has 4 divisors (see below), whose sum is σ = 92082066. Its totient is φ = 30694020.

The previous prime is 61388039. The next prime is 61388051. The reversal of 61388042 is 24088316.

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., 52983841 + 8404201 = 7279^2 + 2899^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15347009 + ... + 15347012.

Almost surely, 2^61388042 is an apocalyptic number.

61388042 is a deficient number, since it is larger than the sum of its proper divisors (30694024).

61388042 is a wasteful number, since it uses less digits than its factorization.

61388042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30694023.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 61388042 is about 7835.0521376695. The cubic root of 61388042 is about 394.4826683641.

The spelling of 61388042 in words is "sixty-one million, three hundred eighty-eight thousand, forty-two".