402425491 has 8 divisors (see below), whose sum is σ = 456191120. Its totient is φ = 351918432.

The previous prime is 402425483. The next prime is 402425509. The reversal of 402425491 is 194524204.

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 402425491 - 2³ = 402425483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402425791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 814380 + ... + 814873.

It is an arithmetic number, because the mean of its divisors is an integer number (57023890).

Almost surely, 2^402425491 is an apocalyptic number.

402425491 is a deficient number, since it is larger than the sum of its proper divisors (53765629).

402425491 is a wasteful number, since it uses less digits than its factorization.

402425491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1629285.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 402425491 is about 20060.5456306652. The cubic root of 402425491 is about 738.2925638709.

Adding to 402425491 its reverse (194524204), we get a palindrome (596949695).

The spelling of 402425491 in words is "four hundred two million, four hundred twenty-five thousand, four hundred ninety-one".