400252425 has 24 divisors (see below), whose sum is σ = 663543840. Its totient is φ = 212889600.

The previous prime is 400252409. The next prime is 400252427. The reversal of 400252425 is 524252004.

It is a happy number.

It is not a de Polignac number, because 400252425 - 2⁴ = 400252409 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 400252395 and 400252404.

It is not an unprimeable number, because it can be changed into a prime (400252427) 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 23 ways as a sum of consecutive naturals, for example, 21385 + ... + 35465.

It is an arithmetic number, because the mean of its divisors is an integer number (27647660).

Almost surely, 2^400252425 is an apocalyptic number.

It is an amenable number.

400252425 is a deficient number, since it is larger than the sum of its proper divisors (263291415).

400252425 is a wasteful number, since it uses less digits than its factorization.

400252425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14473 (or 14468 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 400252425 is about 20006.3096297143. The cubic root of 400252425 is about 736.9612574118.

The spelling of 400252425 in words is "four hundred million, two hundred fifty-two thousand, four hundred twenty-five".