42591026 has 4 divisors (see below), whose sum is σ = 63886542. Its totient is φ = 21295512.

The previous prime is 42591019. The next prime is 42591037. The reversal of 42591026 is 62019524.

It is a happy number.

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., 42237001 + 354025 = 6499^2 + 595^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 42591026.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10647755 + ... + 10647758.

Almost surely, 2^42591026 is an apocalyptic number.

42591026 is a deficient number, since it is larger than the sum of its proper divisors (21295516).

42591026 is a wasteful number, since it uses less digits than its factorization.

42591026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21295515.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 42591026 is about 6526.1800465510. The cubic root of 42591026 is about 349.2255693455.

The spelling of 42591026 in words is "forty-two million, five hundred ninety-one thousand, twenty-six".