1349857 has 4 divisors (see below), whose sum is σ = 1375380. Its totient is φ = 1324336.

The previous prime is 1349827. The next prime is 1349867. The reversal of 1349857 is 7589431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7589431 = 373 ⋅20347.

It can be written as a sum of positive squares in 2 ways, for example, as 1018081 + 331776 = 1009^2 + 576^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1349857 is a prime.

It is a super-2 number, since 2×1349857² = 3644227840898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1349807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12682 + ... + 12787.

It is an arithmetic number, because the mean of its divisors is an integer number (343845).

2^1349857 is an apocalyptic number.

It is an amenable number.

1349857 is a deficient number, since it is larger than the sum of its proper divisors (25523).

1349857 is an equidigital number, since it uses as much as digits as its factorization.

1349857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25522.

The product of its digits is 30240, while the sum is 37.

The square root of 1349857 is about 1161.8334648305. The cubic root of 1349857 is about 110.5170424769.

The spelling of 1349857 in words is "one million, three hundred forty-nine thousand, eight hundred fifty-seven".