400124133 has 6 divisors (see below), whose sum is σ = 577957094. Its totient is φ = 266749416.

The previous prime is 400124129. The next prime is 400124147. The reversal of 400124133 is 331421004.

It can be written as a sum of positive squares in only one way, i.e., 212488929 + 187635204 = 14577^2 + 13698^2 .

It is not a de Polignac number, because 400124133 - 2² = 400124129 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 (400124033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22229110 + ... + 22229127.

Almost surely, 2^400124133 is an apocalyptic number.

It is an amenable number.

400124133 is a deficient number, since it is larger than the sum of its proper divisors (177832961).

400124133 is a wasteful number, since it uses less digits than its factorization.

400124133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44458243 (or 44458240 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 400124133 is about 20003.1030842717. The cubic root of 400124133 is about 736.8825101588.

Adding to 400124133 its reverse (331421004), we get a palindrome (731545137).

The spelling of 400124133 in words is "four hundred million, one hundred twenty-four thousand, one hundred thirty-three".