1025909001 has 12 divisors (see below), whose sum is σ = 1595858628. Its totient is φ = 631328544.

The previous prime is 1025908993. The next prime is 1025909023. The reversal of 1025909001 is 1009095201.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 261662976 + 764246025 = 16176^2 + 27645^2 .

It is not a de Polignac number, because 1025909001 - 2³ = 1025908993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1025909501) 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, 4384110 + ... + 4384343.

It is an arithmetic number, because the mean of its divisors is an integer number (132988219).

Almost surely, 2^1025909001 is an apocalyptic number.

It is an amenable number.

1025909001 is a deficient number, since it is larger than the sum of its proper divisors (569949627).

1025909001 is a wasteful number, since it uses less digits than its factorization.

1025909001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8768472 (or 8768469 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 27.

The square root of 1025909001 is about 32029.8142517249. The cubic root of 1025909001 is about 1008.5628027955.

The spelling of 1025909001 in words is "one billion, twenty-five million, nine hundred nine thousand, one".