1002501025 has 6 divisors (see below), whose sum is σ = 1243101302. Its totient is φ = 802000800.

The previous prime is 1002501007. The next prime is 1002501079. The reversal of 1002501025 is 5201052001.

It can be written as a sum of positive squares in 3 ways, for example, as 199572129 + 802928896 = 14127^2 + 28336^2 .

It is not a de Polignac number, because 1002501025 - 2¹³ = 1002492833 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20049996 + ... + 20050045.

Almost surely, 2^1002501025 is an apocalyptic number.

It is an amenable number.

1002501025 is a deficient number, since it is larger than the sum of its proper divisors (240600277).

1002501025 is an equidigital number, since it uses as much as digits as its factorization.

1002501025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40100051 (or 40100046 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 1002501025 is about 31662.2965844236. The cubic root of 1002501025 is about 1000.8329809501.

Adding to 1002501025 its reverse (5201052001), we get a palindrome (6203553026).

The spelling of 1002501025 in words is "one billion, two million, five hundred one thousand, twenty-five".