3149257 has 4 divisors (see below), whose sum is σ = 3153556. Its totient is φ = 3144960.

The previous prime is 3149249. The next prime is 3149261. The reversal of 3149257 is 7529413.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7529413 = 61 ⋅123433.

It can be written as a sum of positive squares in 2 ways, for example, as 1121481 + 2027776 = 1059^2 + 1424^2 .

It is a cyclic number.

It is not a de Polignac number, because 3149257 - 2³ = 3149249 is a prime.

It is an Ulam number.

It is a Duffinian number.

3149257 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3149057) 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, 744 + ... + 2617.

It is an arithmetic number, because the mean of its divisors is an integer number (788389).

Almost surely, 2^3149257 is an apocalyptic number.

It is an amenable number.

3149257 is a deficient number, since it is larger than the sum of its proper divisors (4299).

3149257 is an equidigital number, since it uses as much as digits as its factorization.

3149257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4298.

The product of its digits is 7560, while the sum is 31.

The square root of 3149257 is about 1774.6146060483. The cubic root of 3149257 is about 146.5781944617.

The spelling of 3149257 in words is "three million, one hundred forty-nine thousand, two hundred fifty-seven".