1025639013 has 16 divisors (see below), whose sum is σ = 1563477120. Its totient is φ = 585854976.

The previous prime is 1025639011. The next prime is 1025639059. The reversal of 1025639013 is 3109365201.

It is not a de Polignac number, because 1025639013 - 2¹ = 1025639011 is a prime.

It is a super-2 number, since 2×1025639013² = 2103870769975228338, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025639011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58093 + ... + 73661.

It is an arithmetic number, because the mean of its divisors is an integer number (97717320).

Almost surely, 2^1025639013 is an apocalyptic number.

It is an amenable number.

1025639013 is a deficient number, since it is larger than the sum of its proper divisors (537838107).

1025639013 is a wasteful number, since it uses less digits than its factorization.

1025639013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18716.

The product of its (nonzero) digits is 4860, while the sum is 30.

The square root of 1025639013 is about 32025.5993386541. The cubic root of 1025639013 is about 1008.4743206968.

The spelling of 1025639013 in words is "one billion, twenty-five million, six hundred thirty-nine thousand, thirteen".