426001491 has 32 divisors (see below), whose sum is σ = 650672640. Its totient is φ = 275335200.

The previous prime is 426001447. The next prime is 426001493. The reversal of 426001491 is 194100624.

426001491 is a `hidden beast` number, since 42 + 600 + 14 + 9 + 1 = 666.

It is not a de Polignac number, because 426001491 - 2¹⁵ = 425968723 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

426001491 is a modest number, since divided by 1491 gives 426 as remainder.

It is not an unprimeable number, because it can be changed into a prime (426001493) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 115116 + ... + 118758.

It is an arithmetic number, because the mean of its divisors is an integer number (20333520).

Almost surely, 2^426001491 is an apocalyptic number.

426001491 is a deficient number, since it is larger than the sum of its proper divisors (224671149).

426001491 is a wasteful number, since it uses less digits than its factorization.

426001491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3784 (or 3778 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 426001491 is about 20639.8035601117. The cubic root of 426001491 is about 752.4373982057.

The spelling of 426001491 in words is "four hundred twenty-six million, one thousand, four hundred ninety-one".