1285798025 has 12 divisors (see below), whose sum is σ = 1598564352. Its totient is φ = 1025945040.

The previous prime is 1285798021. The next prime is 1285798037. The reversal of 1285798025 is 5208975821.

It is not a de Polignac number, because 1285798025 - 2² = 1285798021 is a prime.

It is a super-2 number, since 2×1285798025² = 3306553122187801250, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1285798021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57569 + ... + 76718.

It is an arithmetic number, because the mean of its divisors is an integer number (133213696).

Almost surely, 2^1285798025 is an apocalyptic number.

It is an amenable number.

1285798025 is a deficient number, since it is larger than the sum of its proper divisors (312766327).

1285798025 is a wasteful number, since it uses less digits than its factorization.

1285798025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134680 (or 134675 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 47.

The square root of 1285798025 is about 35858.0259495695. The cubic root of 1285798025 is about 1087.4039797197.

The spelling of 1285798025 in words is "one billion, two hundred eighty-five million, seven hundred ninety-eight thousand, twenty-five".