404772121 has 8 divisors (see below), whose sum is σ = 436540104. Its totient is φ = 373094400.

The previous prime is 404772113. The next prime is 404772127. The reversal of 404772121 is 121277404.

It can be written as a sum of positive squares in 4 ways, for example, as 3370896 + 401401225 = 1836^2 + 20035^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 404772121 - 2³ = 404772113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 404772121.

It is not an unprimeable number, because it can be changed into a prime (404772127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13096 + ... + 31321.

It is an arithmetic number, because the mean of its divisors is an integer number (54567513).

Almost surely, 2^404772121 is an apocalyptic number.

It is an amenable number.

404772121 is a deficient number, since it is larger than the sum of its proper divisors (31767983).

404772121 is a wasteful number, since it uses less digits than its factorization.

404772121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45131.

The product of its (nonzero) digits is 3136, while the sum is 28.

The square root of 404772121 is about 20118.9493015913. The cubic root of 404772121 is about 739.7248313412.

The spelling of 404772121 in words is "four hundred four million, seven hundred seventy-two thousand, one hundred twenty-one".