401425289 has 2 divisors, whose sum is σ = 401425290. Its totient is φ = 401425288.

The previous prime is 401425243. The next prime is 401425291. The reversal of 401425289 is 982524104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 210018064 + 191407225 = 14492^2 + 13835^2 .

It is a cyclic number.

It is not a de Polignac number, because 401425289 - 2⁸ = 401425033 is a prime.

It is a super-2 number, since 2×401425289² = 322284525297467042, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 401425291, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (401425229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200712644 + 200712645.

It is an arithmetic number, because the mean of its divisors is an integer number (200712645).

Almost surely, 2^401425289 is an apocalyptic number.

It is an amenable number.

401425289 is a deficient number, since it is larger than the sum of its proper divisors (1).

401425289 is an equidigital number, since it uses as much as digits as its factorization.

401425289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 401425289 is about 20035.6005400387. The cubic root of 401425289 is about 737.6803972758.

The spelling of 401425289 in words is "four hundred one million, four hundred twenty-five thousand, two hundred eighty-nine".