742556057 has 4 divisors (see below), whose sum is σ = 744696336. Its totient is φ = 740415780.

The previous prime is 742556047. The next prime is 742556083. The reversal of 742556057 is 750655247.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 742556057 - 2¹⁸ = 742293913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (742556047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1069619 + ... + 1070312.

It is an arithmetic number, because the mean of its divisors is an integer number (186174084).

Almost surely, 2^742556057 is an apocalyptic number.

It is an amenable number.

742556057 is a deficient number, since it is larger than the sum of its proper divisors (2140279).

742556057 is a wasteful number, since it uses less digits than its factorization.

742556057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2140278.

The product of its (nonzero) digits is 294000, while the sum is 41.

The square root of 742556057 is about 27249.8817795601. The cubic root of 742556057 is about 905.5443981953.

The spelling of 742556057 in words is "seven hundred forty-two million, five hundred fifty-six thousand, fifty-seven".