421131025 has 12 divisors (see below), whose sum is σ = 596803072. Its totient is φ = 288775440.

The previous prime is 421131023. The next prime is 421131031. The reversal of 421131025 is 520131124.

It is not a de Polignac number, because 421131025 - 2¹ = 421131023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421130993 and 421131011.

It is not an unprimeable number, because it can be changed into a prime (421131023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1203057 + ... + 1203406.

Almost surely, 2^421131025 is an apocalyptic number.

It is an amenable number.

421131025 is a deficient number, since it is larger than the sum of its proper divisors (175672047).

421131025 is a wasteful number, since it uses less digits than its factorization.

421131025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2406480 (or 2406475 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 421131025 is about 20521.4771641809. The cubic root of 421131025 is about 749.5588665118.

Adding to 421131025 its reverse (520131124), we get a palindrome (941262149).

Subtracting 421131025 from its reverse (520131124), we obtain a palindrome (99000099).

The spelling of 421131025 in words is "four hundred twenty-one million, one hundred thirty-one thousand, twenty-five".