400245134 has 4 divisors (see below), whose sum is σ = 600367704. Its totient is φ = 200122566.

The previous prime is 400245113. The next prime is 400245143. The reversal of 400245134 is 431542004.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100061282 + ... + 100061285.

It is an arithmetic number, because the mean of its divisors is an integer number (150091926).

Almost surely, 2^400245134 is an apocalyptic number.

400245134 is a deficient number, since it is larger than the sum of its proper divisors (200122570).

400245134 is a wasteful number, since it uses less digits than its factorization.

400245134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200122569.

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

The square root of 400245134 is about 20006.1274113707. The cubic root of 400245134 is about 736.9567825548.

Adding to 400245134 its reverse (431542004), we get a palindrome (831787138).

The spelling of 400245134 in words is "four hundred million, two hundred forty-five thousand, one hundred thirty-four".