1257315 has 16 divisors (see below), whose sum is σ = 2032800. Its totient is φ = 663552.

The previous prime is 1257313. The next prime is 1257317. The reversal of 1257315 is 5137521.

It is an interprime number because it is at equal distance from previous prime (1257313) and next prime (1257317).

It is not a de Polignac number, because 1257315 - 2¹ = 1257313 is a prime.

1257315 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1257313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1251 + ... + 2019.

It is an arithmetic number, because the mean of its divisors is an integer number (127050).

2^1257315 is an apocalyptic number.

1257315 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1257315 is a deficient number, since it is larger than the sum of its proper divisors (775485).

1257315 is a wasteful number, since it uses less digits than its factorization.

1257315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 886.

The product of its digits is 1050, while the sum is 24.

The square root of 1257315 is about 1121.3005841433. The cubic root of 1257315 is about 107.9314551338.

The spelling of 1257315 in words is "one million, two hundred fifty-seven thousand, three hundred fifteen".