421390125925 has 12 divisors (see below), whose sum is σ = 522540954916. Its totient is φ = 337101004800.

The previous prime is 421390125907. The next prime is 421390125941. The reversal of 421390125925 is 529521093124.

It can be written as a sum of positive squares in 6 ways, for example, as 67661373924 + 353728752001 = 260118^2 + 594751^2 .

It is not a de Polignac number, because 421390125925 - 2⁹ = 421390125413 is a prime.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 545155 + ... + 1067695.

Almost surely, 2^421390125925 is an apocalyptic number.

It is an amenable number.

421390125925 is a deficient number, since it is larger than the sum of its proper divisors (101150828991).

421390125925 is a wasteful number, since it uses less digits than its factorization.

421390125925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554808 (or 554803 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 43.

The spelling of 421390125925 in words is "four hundred twenty-one billion, three hundred ninety million, one hundred twenty-five thousand, nine hundred twenty-five".