2056451 has 4 divisors (see below), whose sum is σ = 2068512. Its totient is φ = 2044392.

The previous prime is 2056441. The next prime is 2056459. The reversal of 2056451 is 1546502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1546502 = 2 ⋅773251.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2056451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2056459) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5771 + ... + 6116.

It is an arithmetic number, because the mean of its divisors is an integer number (517128).

2^2056451 is an apocalyptic number.

2056451 is a deficient number, since it is larger than the sum of its proper divisors (12061).

2056451 is a wasteful number, since it uses less digits than its factorization.

2056451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12060.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 2056451 is about 1434.0331237458. The cubic root of 2056451 is about 127.1665205654.

The spelling of 2056451 in words is "two million, fifty-six thousand, four hundred fifty-one".