1257485 has 8 divisors (see below), whose sum is σ = 1541376. Its totient is φ = 984400.

The previous prime is 1257463. The next prime is 1257491. The reversal of 1257485 is 5847521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1257485 - 2⁸ = 1257229 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 2441 + ... + 2910.

It is an arithmetic number, because the mean of its divisors is an integer number (192672).

2^1257485 is an apocalyptic number.

It is an amenable number.

1257485 is a deficient number, since it is larger than the sum of its proper divisors (283891).

1257485 is an equidigital number, since it uses as much as digits as its factorization.

1257485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5403.

The product of its digits is 11200, while the sum is 32.

The square root of 1257485 is about 1121.3763864109. The cubic root of 1257485 is about 107.9363193406.

The spelling of 1257485 in words is "one million, two hundred fifty-seven thousand, four hundred eighty-five".