2015451 has 6 divisors (see below), whose sum is σ = 2911220. Its totient is φ = 1343628.

The previous prime is 2015443. The next prime is 2015473. The reversal of 2015451 is 1545102.

It is not a de Polignac number, because 2015451 - 2³ = 2015443 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2015411) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 111961 + ... + 111978.

2^2015451 is an apocalyptic number.

2015451 is a deficient number, since it is larger than the sum of its proper divisors (895769).

2015451 is a wasteful number, since it uses less digits than its factorization.

2015451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223945 (or 223942 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 2015451 is about 1419.6658057444. The cubic root of 2015451 is about 126.3157237116.

The spelling of 2015451 in words is "two million, fifteen thousand, four hundred fifty-one".