2421137 has 2 divisors, whose sum is σ = 2421138. Its totient is φ = 2421136.

The previous prime is 2421119. The next prime is 2421149. The reversal of 2421137 is 7311242.

It is a Cunningham number, because it is equal to 1556²+1.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2421136 + 1 = 1556^2 + 1^2 .

It is a cyclic number.

It is not a de Polignac number, because 2421137 - 2⁶ = 2421073 is a prime.

It is not a weakly prime, because it can be changed into another prime (2421737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1210568 + 1210569.

It is an arithmetic number, because the mean of its divisors is an integer number (1210569).

2^2421137 is an apocalyptic number.

It is an amenable number.

2421137 is a deficient number, since it is larger than the sum of its proper divisors (1).

2421137 is an equidigital number, since it uses as much as digits as its factorization.

2421137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 336, while the sum is 20.

The square root of 2421137 is about 1556.0003213367. Note that the first 3 decimals coincide. The cubic root of 2421137 is about 134.2784918727.

Adding to 2421137 its reverse (7311242), we get a palindrome (9732379).

The spelling of 2421137 in words is "two million, four hundred twenty-one thousand, one hundred thirty-seven".