404012523 has 16 divisors (see below), whose sum is σ = 568017920. Its totient is φ = 254723616.

The previous prime is 404012519. The next prime is 404012537. The reversal of 404012523 is 325210404.

It is not a de Polignac number, because 404012523 - 2² = 404012519 is a prime.

It is a super-2 number, since 2×404012523² = 326452237481651058, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 404012523.

It is not an unprimeable number, because it can be changed into a prime (404012513) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28761 + ... + 40437.

It is an arithmetic number, because the mean of its divisors is an integer number (35501120).

Almost surely, 2^404012523 is an apocalyptic number.

404012523 is a deficient number, since it is larger than the sum of its proper divisors (164005397).

404012523 is a wasteful number, since it uses less digits than its factorization.

404012523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12306.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 404012523 is about 20100.0627610960. The cubic root of 404012523 is about 739.2618174424.

Adding to 404012523 its reverse (325210404), we get a palindrome (729222927).

It can be divided in two parts, 40401 and 2523, that added together give a palindrome (42924).

The spelling of 404012523 in words is "four hundred four million, twelve thousand, five hundred twenty-three".