400125051 has 6 divisors (see below), whose sum is σ = 577958420. Its totient is φ = 266750028.

The previous prime is 400125041. The next prime is 400125071. The reversal of 400125051 is 150521004.

It is not a de Polignac number, because 400125051 - 2⁶ = 400124987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400125041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22229161 + ... + 22229178.

Almost surely, 2^400125051 is an apocalyptic number.

400125051 is a deficient number, since it is larger than the sum of its proper divisors (177833369).

400125051 is a wasteful number, since it uses less digits than its factorization.

400125051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44458345 (or 44458342 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 400125051 is about 20003.1260306983. The cubic root of 400125051 is about 736.8830736986.

Adding to 400125051 its reverse (150521004), we get a palindrome (550646055).

The spelling of 400125051 in words is "four hundred million, one hundred twenty-five thousand, fifty-one".