1025423125 has 10 divisors (see below), whose sum is σ = 1281369518. Its totient is φ = 820338000.

The previous prime is 1025423083. The next prime is 1025423129. The reversal of 1025423125 is 5213245201.

It can be written as a sum of positive squares in 5 ways, for example, as 292854769 + 732568356 = 17113^2 + 27066^2 .

It is not a de Polignac number, because 1025423125 - 2⁹ = 1025422613 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1025423125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025423129) 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, 819714 + ... + 820963.

Almost surely, 2^1025423125 is an apocalyptic number.

It is an amenable number.

1025423125 is a deficient number, since it is larger than the sum of its proper divisors (255946393).

1025423125 is an frugal number, since it uses more digits than its factorization.

1025423125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1640697 (or 1640682 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1025423125 is about 32022.2286076407. The cubic root of 1025423125 is about 1008.4035574038.

Adding to 1025423125 its reverse (5213245201), we get a palindrome (6238668326).

The spelling of 1025423125 in words is "one billion, twenty-five million, four hundred twenty-three thousand, one hundred twenty-five".