3145720 has 16 divisors (see below), whose sum is σ = 7077960. Its totient is φ = 1258272.

The previous prime is 3145711. The next prime is 3145721. The reversal of 3145720 is 275413.

It is a junction number, because it is equal to n+sod(n) for n = 3145691 and 3145700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3145721) 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, 39282 + ... + 39361.

Almost surely, 2^3145720 is an apocalyptic number.

It is an amenable number.

3145720 is an abundant number, since it is smaller than the sum of its proper divisors (3932240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3145720 is a wasteful number, since it uses less digits than its factorization.

3145720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78654 (or 78650 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 3145720 is about 1773.6177716746. The cubic root of 3145720 is about 146.5232988373.

The spelling of 3145720 in words is "three million, one hundred forty-five thousand, seven hundred twenty".