426187491 has 16 divisors (see below), whose sum is σ = 583613184. Its totient is φ = 276492384.

The previous prime is 426187481. The next prime is 426187519. The reversal of 426187491 is 194781624.

It is not a de Polignac number, because 426187491 - 2⁶ = 426187427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (426187441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29770 + ... + 41696.

It is an arithmetic number, because the mean of its divisors is an integer number (36475824).

Almost surely, 2^426187491 is an apocalyptic number.

426187491 is a deficient number, since it is larger than the sum of its proper divisors (157425693).

426187491 is a wasteful number, since it uses less digits than its factorization.

426187491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12250.

The product of its digits is 96768, while the sum is 42.

The square root of 426187491 is about 20644.3089252220. The cubic root of 426187491 is about 752.5468915566.

The spelling of 426187491 in words is "four hundred twenty-six million, one hundred eighty-seven thousand, four hundred ninety-one".