400425134 has 4 divisors (see below), whose sum is σ = 600637704. Its totient is φ = 200212566.

The previous prime is 400425131. The next prime is 400425139. The reversal of 400425134 is 431524004.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400425131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100106282 + ... + 100106285.

It is an arithmetic number, because the mean of its divisors is an integer number (150159426).

Almost surely, 2^400425134 is an apocalyptic number.

400425134 is a deficient number, since it is larger than the sum of its proper divisors (200212570).

400425134 is a wasteful number, since it uses less digits than its factorization.

400425134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200212569.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 400425134 is about 20010.6255274542. The cubic root of 400425134 is about 737.0672418116.

Adding to 400425134 its reverse (431524004), we get a palindrome (831949138).

The spelling of 400425134 in words is "four hundred million, four hundred twenty-five thousand, one hundred thirty-four".