42257816 has 8 divisors (see below), whose sum is σ = 79233420. Its totient is φ = 21128904.

The previous prime is 42257797. The next prime is 42257833. The reversal of 42257816 is 61875224.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 2641106 + ... + 2641121.

Almost surely, 2^42257816 is an apocalyptic number.

It is an amenable number.

42257816 is a deficient number, since it is larger than the sum of its proper divisors (36975604).

42257816 is a wasteful number, since it uses less digits than its factorization.

42257816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5282233 (or 5282229 counting only the distinct ones).

The product of its digits is 26880, while the sum is 35.

The square root of 42257816 is about 6500.6012029658. The cubic root of 42257816 is about 348.3124643272.

The spelling of 42257816 in words is "forty-two million, two hundred fifty-seven thousand, eight hundred sixteen".