2620451 has 4 divisors (see below), whose sum is σ = 2691312. Its totient is φ = 2549592.

The previous prime is 2620441. The next prime is 2620477. The reversal of 2620451 is 1540262.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2620451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2620421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35375 + ... + 35448.

It is an arithmetic number, because the mean of its divisors is an integer number (672828).

2^2620451 is an apocalyptic number.

2620451 is a deficient number, since it is larger than the sum of its proper divisors (70861).

2620451 is an equidigital number, since it uses as much as digits as its factorization.

2620451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70860.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 2620451 is about 1618.7807139943. The cubic root of 2620451 is about 137.8664780077.

The spelling of 2620451 in words is "two million, six hundred twenty thousand, four hundred fifty-one".