1421325625 has 10 divisors (see below), whose sum is σ = 1776089282. Its totient is φ = 1137060000.

The previous prime is 1421325611. The next prime is 1421325629. The reversal of 1421325625 is 5265231241.

It can be written as a sum of positive squares in 5 ways, for example, as 948393616 + 472932009 = 30796^2 + 21747^2 .

It is not a de Polignac number, because 1421325625 - 2⁵ = 1421325593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1421325629) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1136436 + ... + 1137685.

Almost surely, 2^1421325625 is an apocalyptic number.

It is an amenable number.

1421325625 is a deficient number, since it is larger than the sum of its proper divisors (354763657).

1421325625 is an frugal number, since it uses more digits than its factorization.

1421325625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2274141 (or 2274126 counting only the distinct ones).

The product of its digits is 14400, while the sum is 31.

The square root of 1421325625 is about 37700.4724771454. The cubic root of 1421325625 is about 1124.3405188339.

Adding to 1421325625 its reverse (5265231241), we get a palindrome (6686556866).

The spelling of 1421325625 in words is "one billion, four hundred twenty-one million, three hundred twenty-five thousand, six hundred twenty-five".