1145257 has 4 divisors (see below), whose sum is σ = 1156480. Its totient is φ = 1134036.

The previous prime is 1145227. The next prime is 1145269. The reversal of 1145257 is 7525411.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1145257 - 2⁷ = 1145129 is a prime.

It is a super-2 number, since 2×1145257² = 2623227192098, which contains 22 as substring.

It is a Duffinian number.

1145257 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1145227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5457 + ... + 5662.

It is an arithmetic number, because the mean of its divisors is an integer number (289120).

It is a Poulet number, since it divides 2^1145256-1.

2^1145257 is an apocalyptic number.

It is an amenable number.

1145257 is a deficient number, since it is larger than the sum of its proper divisors (11223).

1145257 is a wasteful number, since it uses less digits than its factorization.

1145257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11222.

The product of its digits is 1400, while the sum is 25.

The square root of 1145257 is about 1070.1668094274. The cubic root of 1145257 is about 104.6247223083.

The spelling of 1145257 in words is "one million, one hundred forty-five thousand, two hundred fifty-seven".