2451855 has 32 divisors (see below), whose sum is σ = 4723200. Its totient is φ = 1060992.

The previous prime is 2451847. The next prime is 2451857. The reversal of 2451855 is 5581542.

2451855 = T₅₆ + T₅₇ + ... + T₂₄₅.

It is not a de Polignac number, because 2451855 - 2³ = 2451847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2451857) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1381 + ... + 2609.

It is an arithmetic number, because the mean of its divisors is an integer number (147600).

2^2451855 is an apocalyptic number.

2451855 is a deficient number, since it is larger than the sum of its proper divisors (2271345).

2451855 is a wasteful number, since it uses less digits than its factorization.

2451855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1263.

The product of its digits is 8000, while the sum is 30.

The square root of 2451855 is about 1565.8400301436. The cubic root of 2451855 is about 134.8439898754.

The spelling of 2451855 in words is "two million, four hundred fifty-one thousand, eight hundred fifty-five".