1345257 has 12 divisors (see below), whose sum is σ = 2045680. Its totient is φ = 849528.

The previous prime is 1345243. The next prime is 1345271. The reversal of 1345257 is 7525431.

It is a happy number.

1345257 is a `hidden beast` number, since 134 + 525 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (1345243) and next prime (1345271).

It is not a de Polignac number, because 1345257 - 2⁴ = 1345241 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1345257.

It is not an unprimeable number, because it can be changed into a prime (1345207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3763 + ... + 4104.

2^1345257 is an apocalyptic number.

It is an amenable number.

1345257 is a deficient number, since it is larger than the sum of its proper divisors (700423).

1345257 is a wasteful number, since it uses less digits than its factorization.

1345257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7892 (or 7889 counting only the distinct ones).

The product of its digits is 4200, while the sum is 27.

The square root of 1345257 is about 1159.8521457496. The cubic root of 1345257 is about 110.3913607764.

The spelling of 1345257 in words is "one million, three hundred forty-five thousand, two hundred fifty-seven".