2490421 has 2 divisors, whose sum is σ = 2490422. Its totient is φ = 2490420.

The previous prime is 2490413. The next prime is 2490451. The reversal of 2490421 is 1240942.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1311025 + 1179396 = 1145^2 + 1086^2 .

It is a cyclic number.

It is not a de Polignac number, because 2490421 - 2³ = 2490413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2490392 and 2490401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2490451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1245210 + 1245211.

It is an arithmetic number, because the mean of its divisors is an integer number (1245211).

2^2490421 is an apocalyptic number.

It is an amenable number.

2490421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2490421 is an equidigital number, since it uses as much as digits as its factorization.

2490421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 2490421 is about 1578.1067771225. The cubic root of 2490421 is about 135.5473162550.

The spelling of 2490421 in words is "two million, four hundred ninety thousand, four hundred twenty-one".