402415451 has 4 divisors (see below), whose sum is σ = 412230504. Its totient is φ = 392600400.

The previous prime is 402415439. The next prime is 402415471. The reversal of 402415451 is 154514204.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 402415451 - 2²² = 398221147 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 402415451.

It is not an unprimeable number, because it can be changed into a prime (402415471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4907465 + ... + 4907546.

It is an arithmetic number, because the mean of its divisors is an integer number (103057626).

Almost surely, 2^402415451 is an apocalyptic number.

402415451 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

402415451 is a deficient number, since it is larger than the sum of its proper divisors (9815053).

402415451 is an equidigital number, since it uses as much as digits as its factorization.

402415451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9815052.

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 402415451 is about 20060.2953866587. The cubic root of 402415451 is about 738.2864240022.

Adding to 402415451 its reverse (154514204), we get a palindrome (556929655).

The spelling of 402415451 in words is "four hundred two million, four hundred fifteen thousand, four hundred fifty-one".