2157451 has 2 divisors, whose sum is σ = 2157452. Its totient is φ = 2157450.

The previous prime is 2157427. The next prime is 2157457. The reversal of 2157451 is 1547512.

2157451 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2157451 - 2⁹ = 2156939 is a prime.

It is not a weakly prime, because it can be changed into another prime (2157457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078725 + 1078726.

It is an arithmetic number, because the mean of its divisors is an integer number (1078726).

2^2157451 is an apocalyptic number.

2157451 is a deficient number, since it is larger than the sum of its proper divisors (1).

2157451 is an equidigital number, since it uses as much as digits as its factorization.

2157451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1400, while the sum is 25.

The square root of 2157451 is about 1468.8264022682. The cubic root of 2157451 is about 129.2152127384.

The spelling of 2157451 in words is "two million, one hundred fifty-seven thousand, four hundred fifty-one".