405521130 has 32 divisors (see below), whose sum is σ = 1112287104. Its totient is φ = 92690496.

The previous prime is 405521087. The next prime is 405521153. The reversal of 405521130 is 31125504.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 405521097 and 405521106.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 965317 + ... + 965736.

It is an arithmetic number, because the mean of its divisors is an integer number (34758972).

Almost surely, 2^405521130 is an apocalyptic number.

405521130 is an abundant number, since it is smaller than the sum of its proper divisors (706765974).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

405521130 is a wasteful number, since it uses less digits than its factorization.

405521130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1931070.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 405521130 is about 20137.5552140770. Note that the first 3 decimals coincide. The cubic root of 405521130 is about 740.1808238411.

Adding to 405521130 its reverse (31125504), we get a palindrome (436646634).

The spelling of 405521130 in words is "four hundred five million, five hundred twenty-one thousand, one hundred thirty".