405476121 has 4 divisors (see below), whose sum is σ = 540634832. Its totient is φ = 270317412.

The previous prime is 405476119. The next prime is 405476171. The reversal of 405476121 is 121674504.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 405476121 - 2¹ = 405476119 is a prime.

It is a super-3 number, since 3×405476121³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (405476171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67579351 + ... + 67579356.

It is an arithmetic number, because the mean of its divisors is an integer number (135158708).

Almost surely, 2^405476121 is an apocalyptic number.

It is an amenable number.

405476121 is a deficient number, since it is larger than the sum of its proper divisors (135158711).

405476121 is a wasteful number, since it uses less digits than its factorization.

405476121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135158710.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 405476121 is about 20136.4376442309. The cubic root of 405476121 is about 740.1534384771.

The spelling of 405476121 in words is "four hundred five million, four hundred seventy-six thousand, one hundred twenty-one".