402441121 has 2 divisors, whose sum is σ = 402441122. Its totient is φ = 402441120.

The previous prime is 402441079. The next prime is 402441131. The reversal of 402441121 is 121144204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 271590400 + 130850721 = 16480^2 + 11439^2 .

It is a cyclic number.

It is not a de Polignac number, because 402441121 - 2¹⁹ = 401916833 is a prime.

It is not a weakly prime, because it can be changed into another prime (402441131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201220560 + 201220561.

It is an arithmetic number, because the mean of its divisors is an integer number (201220561).

Almost surely, 2^402441121 is an apocalyptic number.

It is an amenable number.

402441121 is a deficient number, since it is larger than the sum of its proper divisors (1).

402441121 is an equidigital number, since it uses as much as digits as its factorization.

402441121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 402441121 is about 20060.9351975425. The cubic root of 402441121 is about 738.3021220489.

Adding to 402441121 its reverse (121144204), we get a palindrome (523585325).

The spelling of 402441121 in words is "four hundred two million, four hundred forty-one thousand, one hundred twenty-one".