402401505 has 32 divisors (see below), whose sum is σ = 703945728. Its totient is φ = 194667200.

The previous prime is 402401497. The next prime is 402401507. The reversal of 402401505 is 505104204.

It is not a de Polignac number, because 402401505 - 2³ = 402401497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (402401507) 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, 78532 + ... + 83498.

It is an arithmetic number, because the mean of its divisors is an integer number (21998304).

Almost surely, 2^402401505 is an apocalyptic number.

It is an amenable number.

402401505 is a deficient number, since it is larger than the sum of its proper divisors (301544223).

402401505 is a wasteful number, since it uses less digits than its factorization.

402401505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5477.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 402401505 is about 20059.9477815871. The cubic root of 402401505 is about 738.2778952861.

Adding to 402401505 its reverse (505104204), we get a palindrome (907505709).

The spelling of 402401505 in words is "four hundred two million, four hundred one thousand, five hundred five".