3145257 has 8 divisors (see below), whose sum is σ = 4659680. Its totient is φ = 2096820.

The previous prime is 3145249. The next prime is 3145283. The reversal of 3145257 is 7525413.

It is a happy number.

It is not a de Polignac number, because 3145257 - 2³ = 3145249 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 116491 = 3145257 / (3 + 1 + 4 + 5 + 2 + 5 + 7).

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 3145257.

It is not an unprimeable number, because it can be changed into a prime (3145297) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58219 + ... + 58272.

It is an arithmetic number, because the mean of its divisors is an integer number (582460).

Almost surely, 2^3145257 is an apocalyptic number.

It is an amenable number.

3145257 is a deficient number, since it is larger than the sum of its proper divisors (1514423).

3145257 is a wasteful number, since it uses less digits than its factorization.

3145257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116500 (or 116494 counting only the distinct ones).

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

The square root of 3145257 is about 1773.4872426945. The cubic root of 3145257 is about 146.5161098508.

The spelling of 3145257 in words is "three million, one hundred forty-five thousand, two hundred fifty-seven".