1257165 has 48 divisors (see below), whose sum is σ = 2690688. Its totient is φ = 528768.

The previous prime is 1257163. The next prime is 1257199. The reversal of 1257165 is 5617521.

It is not a de Polignac number, because 1257165 - 2¹ = 1257163 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1257163) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3942 + ... + 4248.

It is an arithmetic number, because the mean of its divisors is an integer number (56056).

2^1257165 is an apocalyptic number.

1257165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1257165 is an abundant number, since it is smaller than the sum of its proper divisors (1433523).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1257165 is a wasteful number, since it uses less digits than its factorization.

1257165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338 (or 335 counting only the distinct ones).

The product of its digits is 2100, while the sum is 27.

The square root of 1257165 is about 1121.2336955336. The cubic root of 1257165 is about 107.9271628225.

The spelling of 1257165 in words is "one million, two hundred fifty-seven thousand, one hundred sixty-five".