421903925 has 12 divisors (see below), whose sum is σ = 528557316. Its totient is φ = 334041600.

The previous prime is 421903907. The next prime is 421903931. The reversal of 421903925 is 529309124.

It can be written as a sum of positive squares in 6 ways, for example, as 4355569 + 417548356 = 2087^2 + 20434^2 .

It is not a de Polignac number, because 421903925 - 2¹⁴ = 421887541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84566 + ... + 89415.

It is an arithmetic number, because the mean of its divisors is an integer number (44046443).

Almost surely, 2^421903925 is an apocalyptic number.

It is an amenable number.

421903925 is a deficient number, since it is larger than the sum of its proper divisors (106653391).

421903925 is a wasteful number, since it uses less digits than its factorization.

421903925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174088 (or 174083 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 421903925 is about 20540.3000221516. The cubic root of 421903925 is about 750.0171403490.

The spelling of 421903925 in words is "four hundred twenty-one million, nine hundred three thousand, nine hundred twenty-five".