400121134 has 16 divisors (see below), whose sum is σ = 689715936. Its totient is φ = 170532000.

The previous prime is 400121131. The next prime is 400121177. The reversal of 400121134 is 431121004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400121131) 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, 76417 + ... + 81484.

It is an arithmetic number, because the mean of its divisors is an integer number (43107246).

Almost surely, 2^400121134 is an apocalyptic number.

400121134 is a deficient number, since it is larger than the sum of its proper divisors (289594802).

400121134 is a wasteful number, since it uses less digits than its factorization.

400121134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158091.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 400121134 is about 20003.0281207621. The cubic root of 400121134 is about 736.8806691333.

Adding to 400121134 its reverse (431121004), we get a palindrome (831242138).

The spelling of 400121134 in words is "four hundred million, one hundred twenty-one thousand, one hundred thirty-four".