1025402427 has 24 divisors (see below), whose sum is σ = 1693617120. Its totient is φ = 585636480.

The previous prime is 1025402419. The next prime is 1025402473. The reversal of 1025402427 is 7242045201.

It is not a de Polignac number, because 1025402427 - 2³ = 1025402419 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1025402427.

It is not an unprimeable number, because it can be changed into a prime (1025402227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 177399 + ... + 183087.

It is an arithmetic number, because the mean of its divisors is an integer number (70567380).

Almost surely, 2^1025402427 is an apocalyptic number.

1025402427 is a deficient number, since it is larger than the sum of its proper divisors (668214693).

1025402427 is a wasteful number, since it uses less digits than its factorization.

1025402427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8563 (or 8560 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 27.

The square root of 1025402427 is about 32021.9054242561. The cubic root of 1025402427 is about 1008.3967725373.

Adding to 1025402427 its reverse (7242045201), we get a palindrome (8267447628).

The spelling of 1025402427 in words is "one billion, twenty-five million, four hundred two thousand, four hundred twenty-seven".