2515720 has 32 divisors (see below), whose sum is σ = 5722200. Its totient is φ = 995328.

The previous prime is 2515703. The next prime is 2515727. The reversal of 2515720 is 275152.

It can be written as a sum of positive squares in 4 ways, for example, as 2515396 + 324 = 1586^2 + 18^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2515691 and 2515700.

It is not an unprimeable number, because it can be changed into a prime (2515727) 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, 4072 + ... + 4648.

2^2515720 is an apocalyptic number.

2515720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2515720 is an abundant number, since it is smaller than the sum of its proper divisors (3206480).

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

2515720 is a wasteful number, since it uses less digits than its factorization.

2515720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 697 (or 693 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 22.

The square root of 2515720 is about 1586.1021404689. The cubic root of 2515720 is about 136.0047576190.

The spelling of 2515720 in words is "two million, five hundred fifteen thousand, seven hundred twenty".