401012520 has 64 divisors (see below), whose sum is σ = 1207811520. Its totient is φ = 106512384.

The previous prime is 401012503. The next prime is 401012569. The reversal of 401012520 is 25210104.

It is a super-2 number, since 2×401012520² = 321622082393500800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 401012520.

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, 24339 + ... + 37341.

It is an arithmetic number, because the mean of its divisors is an integer number (18872055).

Almost surely, 2^401012520 is an apocalyptic number.

401012520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 401012520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (603905760).

401012520 is an abundant number, since it is smaller than the sum of its proper divisors (806799000).

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

401012520 is a wasteful number, since it uses less digits than its factorization.

401012520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13274 (or 13270 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 401012520 is about 20025.2970015428. The cubic root of 401012520 is about 737.4274684965.

Adding to 401012520 its reverse (25210104), we get a palindrome (426222624).

The spelling of 401012520 in words is "four hundred one million, twelve thousand, five hundred twenty".