2720531 has 8 divisors (see below), whose sum is σ = 2996400. Its totient is φ = 2449440.

The previous prime is 2720513. The next prime is 2720551. The reversal of 2720531 is 1350272.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2720531 is a prime.

It is a super-2 number, since 2×2720531² = 14802577843922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2720551) 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, 65 + ... + 2333.

It is an arithmetic number, because the mean of its divisors is an integer number (374550).

2^2720531 is an apocalyptic number.

2720531 is a deficient number, since it is larger than the sum of its proper divisors (275869).

2720531 is a wasteful number, since it uses less digits than its factorization.

2720531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2389.

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 2720531 is about 1649.4032254121. The cubic root of 2720531 is about 139.5997240028.

The spelling of 2720531 in words is "two million, seven hundred twenty thousand, five hundred thirty-one".