90257042 has 4 divisors (see below), whose sum is σ = 135385566. Its totient is φ = 45128520.

The previous prime is 90257033. The next prime is 90257051. The reversal of 90257042 is 24075209.

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

It is an interprime number because it is at equal distance from previous prime (90257033) and next prime (90257051).

It can be written as a sum of positive squares in only one way, i.e., 58997761 + 31259281 = 7681^2 + 5591^2 .

It is a junction number, because it is equal to n+sod(n) for n = 90256996 and 90257014.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22564259 + ... + 22564262.

Almost surely, 2^90257042 is an apocalyptic number.

90257042 is a deficient number, since it is larger than the sum of its proper divisors (45128524).

90257042 is a wasteful number, since it uses less digits than its factorization.

90257042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45128523.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 90257042 is about 9500.3706243493. The cubic root of 90257042 is about 448.5667021925.

The spelling of 90257042 in words is "ninety million, two hundred fifty-seven thousand, forty-two".