1257725 has 12 divisors (see below), whose sum is σ = 1782624. Its totient is φ = 862320.

The previous prime is 1257721. The next prime is 1257749. The reversal of 1257725 is 5277521.

It is not a de Polignac number, because 1257725 - 2² = 1257721 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1257721) 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, 3419 + ... + 3768.

It is an arithmetic number, because the mean of its divisors is an integer number (148552).

2^1257725 is an apocalyptic number.

It is an amenable number.

1257725 is a deficient number, since it is larger than the sum of its proper divisors (524899).

1257725 is an equidigital number, since it uses as much as digits as its factorization.

1257725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7204 (or 7199 counting only the distinct ones).

The product of its digits is 4900, while the sum is 29.

The square root of 1257725 is about 1121.4833926546. The cubic root of 1257725 is about 107.9431857098.

The spelling of 1257725 in words is "one million, two hundred fifty-seven thousand, seven hundred twenty-five".