401260309 has 2 divisors, whose sum is σ = 401260310. Its totient is φ = 401260308.

The previous prime is 401260247. The next prime is 401260313. The reversal of 401260309 is 903062104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 279224100 + 122036209 = 16710^2 + 11047^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-401260309 is a prime.

It is a super-2 number, since 2×401260309² = 322019671157550962, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401263309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200630154 + 200630155.

It is an arithmetic number, because the mean of its divisors is an integer number (200630155).

Almost surely, 2^401260309 is an apocalyptic number.

It is an amenable number.

401260309 is a deficient number, since it is larger than the sum of its proper divisors (1).

401260309 is an equidigital number, since it uses as much as digits as its factorization.

401260309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 401260309 is about 20031.4829456034. The cubic root of 401260309 is about 737.5793247626.

The spelling of 401260309 in words is "four hundred one million, two hundred sixty thousand, three hundred nine".