42626591 has 8 divisors (see below), whose sum is σ = 49072800. Its totient is φ = 36269568.

The previous prime is 42626569. The next prime is 42626609. The reversal of 42626591 is 19562624.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42626591 - 2⁶ = 42626527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42626501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21266 + ... + 23183.

It is an arithmetic number, because the mean of its divisors is an integer number (6134100).

Almost surely, 2^42626591 is an apocalyptic number.

42626591 is a deficient number, since it is larger than the sum of its proper divisors (6446209).

42626591 is a wasteful number, since it uses less digits than its factorization.

42626591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44593.

The product of its digits is 25920, while the sum is 35.

The square root of 42626591 is about 6528.9042725407. The cubic root of 42626591 is about 349.3227474997.

The spelling of 42626591 in words is "forty-two million, six hundred twenty-six thousand, five hundred ninety-one".