3145657 has 4 divisors (see below), whose sum is σ = 3168756. Its totient is φ = 3122560.

The previous prime is 3145633. The next prime is 3145661. The reversal of 3145657 is 7565413.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7565413 = 23 ⋅328931.

It can be written as a sum of positive squares in 2 ways, for example, as 2013561 + 1132096 = 1419^2 + 1064^2 .

It is a cyclic number.

It is not a de Polignac number, because 3145657 - 2⁷ = 3145529 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3145607) 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, 11344 + ... + 11617.

It is an arithmetic number, because the mean of its divisors is an integer number (792189).

Almost surely, 2^3145657 is an apocalyptic number.

It is an amenable number.

3145657 is a deficient number, since it is larger than the sum of its proper divisors (23099).

3145657 is a wasteful number, since it uses less digits than its factorization.

3145657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23098.

The product of its digits is 12600, while the sum is 31.

The square root of 3145657 is about 1773.6000112765. The cubic root of 3145657 is about 146.5223206797.

It can be divided in two parts, 31456 and 57, that added together give a palindrome (31513).

The spelling of 3145657 in words is "three million, one hundred forty-five thousand, six hundred fifty-seven".