2453921 has 2 divisors, whose sum is σ = 2453922. Its totient is φ = 2453920.

The previous prime is 2453909. The next prime is 2453923. The reversal of 2453921 is 1293542.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1380625 + 1073296 = 1175^2 + 1036^2 .

It is a cyclic number.

It is not a de Polignac number, because 2453921 - 2¹⁰ = 2452897 is a prime.

Together with 2453923, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2453923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1226960 + 1226961.

It is an arithmetic number, because the mean of its divisors is an integer number (1226961).

2^2453921 is an apocalyptic number.

It is an amenable number.

2453921 is a deficient number, since it is larger than the sum of its proper divisors (1).

2453921 is an equidigital number, since it uses as much as digits as its factorization.

2453921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 26.

The square root of 2453921 is about 1566.4996010213. The cubic root of 2453921 is about 134.8818536522.

The spelling of 2453921 in words is "two million, four hundred fifty-three thousand, nine hundred twenty-one".