42577994 has 4 divisors (see below), whose sum is σ = 63866994. Its totient is φ = 21288996.

The previous prime is 42577981. The next prime is 42578017. The reversal of 42577994 is 49977524.

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., 21298225 + 21279769 = 4615^2 + 4613^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10644497 + ... + 10644500.

Almost surely, 2^42577994 is an apocalyptic number.

42577994 is a deficient number, since it is larger than the sum of its proper divisors (21289000).

42577994 is a wasteful number, since it uses less digits than its factorization.

42577994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21288999.

The product of its digits is 635040, while the sum is 47.

The square root of 42577994 is about 6525.1815300419. The cubic root of 42577994 is about 349.1899470380.

The spelling of 42577994 in words is "forty-two million, five hundred seventy-seven thousand, nine hundred ninety-four".