1290216725 has 12 divisors (see below), whose sum is σ = 1828421664. Its totient is φ = 884719920.

The previous prime is 1290216701. The next prime is 1290216731. The reversal of 1290216725 is 5276120921.

It is not a de Polignac number, because 1290216725 - 2⁸ = 1290216469 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3686159 + ... + 3686508.

It is an arithmetic number, because the mean of its divisors is an integer number (152368472).

Almost surely, 2^1290216725 is an apocalyptic number.

It is an amenable number.

1290216725 is a deficient number, since it is larger than the sum of its proper divisors (538204939).

1290216725 is an equidigital number, since it uses as much as digits as its factorization.

1290216725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7372684 (or 7372679 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 1290216725 is about 35919.5869269122. The cubic root of 1290216725 is about 1088.6481923308.

The spelling of 1290216725 in words is "one billion, two hundred ninety million, two hundred sixteen thousand, seven hundred twenty-five".