1345857 has 8 divisors (see below), whose sum is σ = 1836384. Its totient is φ = 876288.

The previous prime is 1345811. The next prime is 1345859. The reversal of 1345857 is 7585431.

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

It is not a de Polignac number, because 1345857 - 2¹⁸ = 1083713 is a prime.

It is a super-2 number, since 2×1345857² = 3622662128898, which contains 22 as substring.

1345857 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1345859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5088 + ... + 5345.

It is an arithmetic number, because the mean of its divisors is an integer number (229548).

2^1345857 is an apocalyptic number.

It is an amenable number.

1345857 is a deficient number, since it is larger than the sum of its proper divisors (490527).

1345857 is a wasteful number, since it uses less digits than its factorization.

1345857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10479.

The product of its digits is 16800, while the sum is 33.

The square root of 1345857 is about 1160.1107705732. The cubic root of 1345857 is about 110.4077702733.

The spelling of 1345857 in words is "one million, three hundred forty-five thousand, eight hundred fifty-seven".