1020025251 has 16 divisors (see below), whose sum is σ = 1727027200. Its totient is φ = 582871464.

The previous prime is 1020025189. The next prime is 1020025267. The reversal of 1020025251 is 1525200201.

It is not a de Polignac number, because 1020025251 - 2⁶ = 1020025187 is a prime.

It is a super-2 number, since 2×1020025251² = 2080903025355226002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020025151) 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, 2698291 + ... + 2698668.

It is an arithmetic number, because the mean of its divisors is an integer number (107939200).

Almost surely, 2^1020025251 is an apocalyptic number.

1020025251 is a deficient number, since it is larger than the sum of its proper divisors (707001949).

1020025251 is an equidigital number, since it uses as much as digits as its factorization.

1020025251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5396975 (or 5396969 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 1020025251 is about 31937.8341626354. The cubic root of 1020025251 is about 1006.6310161027.

Adding to 1020025251 its reverse (1525200201), we get a palindrome (2545225452).

The spelling of 1020025251 in words is "one billion, twenty million, twenty-five thousand, two hundred fifty-one".