402150121 has 2 divisors, whose sum is σ = 402150122. Its totient is φ = 402150120.

The previous prime is 402150109. The next prime is 402150127. The reversal of 402150121 is 121051204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 366914025 + 35236096 = 19155^2 + 5936^2 .

It is a cyclic number.

It is not a de Polignac number, because 402150121 - 2²¹ = 400052969 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 402150095 and 402150104.

It is not a weakly prime, because it can be changed into another prime (402150127) 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, 201075060 + 201075061.

It is an arithmetic number, because the mean of its divisors is an integer number (201075061).

Almost surely, 2^402150121 is an apocalyptic number.

It is an amenable number.

402150121 is a deficient number, since it is larger than the sum of its proper divisors (1).

402150121 is an equidigital number, since it uses as much as digits as its factorization.

402150121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 402150121 is about 20053.6809837995. The cubic root of 402150121 is about 738.1241268828.

The spelling of 402150121 in words is "four hundred two million, one hundred fifty thousand, one hundred twenty-one".