401242469 has 2 divisors, whose sum is σ = 401242470. Its totient is φ = 401242468.

The previous prime is 401242447. The next prime is 401242487. The reversal of 401242469 is 964242104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 394022500 + 7219969 = 19850^2 + 2687^2 .

It is a cyclic number.

It is not a de Polignac number, because 401242469 - 2⁸ = 401242213 is a prime.

It is a super-2 number, since 2×401242469² = 321991037858431922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401242069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200621234 + 200621235.

It is an arithmetic number, because the mean of its divisors is an integer number (200621235).

Almost surely, 2^401242469 is an apocalyptic number.

It is an amenable number.

401242469 is a deficient number, since it is larger than the sum of its proper divisors (1).

401242469 is an equidigital number, since it uses as much as digits as its factorization.

401242469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 401242469 is about 20031.0376416201. The cubic root of 401242469 is about 737.5683936955.

The spelling of 401242469 in words is "four hundred one million, two hundred forty-two thousand, four hundred sixty-nine".