400112751 has 16 divisors (see below), whose sum is σ = 538428800. Its totient is φ = 264277728.

The previous prime is 400112749. The next prime is 400112821. The reversal of 400112751 is 157211004.

It is a happy number.

It is not a de Polignac number, because 400112751 - 2¹ = 400112749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400112651) 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 15 ways as a sum of consecutive naturals, for example, 357645 + ... + 358761.

It is an arithmetic number, because the mean of its divisors is an integer number (33651800).

Almost surely, 2^400112751 is an apocalyptic number.

400112751 is a deficient number, since it is larger than the sum of its proper divisors (138316049).

400112751 is a wasteful number, since it uses less digits than its factorization.

400112751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2118.

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 400112751 is about 20002.8185763907. The cubic root of 400112751 is about 736.8755229302.

Adding to 400112751 its reverse (157211004), we get a palindrome (557323755).

The spelling of 400112751 in words is "four hundred million, one hundred twelve thousand, seven hundred fifty-one".