1257117 has 8 divisors (see below), whose sum is σ = 1686240. Its totient is φ = 833040.

The previous prime is 1257103. The next prime is 1257119. The reversal of 1257117 is 7117521.

It is a happy number.

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

It is not a de Polignac number, because 1257117 - 2⁷ = 1256989 is a prime.

1257117 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1257119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 634 + ... + 1707.

It is an arithmetic number, because the mean of its divisors is an integer number (210780).

2^1257117 is an apocalyptic number.

It is an amenable number.

1257117 is a deficient number, since it is larger than the sum of its proper divisors (429123).

1257117 is a wasteful number, since it uses less digits than its factorization.

1257117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2523.

The product of its digits is 490, while the sum is 24.

The square root of 1257117 is about 1121.2122903358. The cubic root of 1257117 is about 107.9257892107.

The spelling of 1257117 in words is "one million, two hundred fifty-seven thousand, one hundred seventeen".