401023001 has 2 divisors, whose sum is σ = 401023002. Its totient is φ = 401023000.

The previous prime is 401022977. The next prime is 401023067. The reversal of 401023001 is 100320104.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 300120976 + 100902025 = 17324^2 + 10045^2 .

It is a cyclic number.

It is not a de Polignac number, because 401023001 - 2²⁶ = 333914137 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (401023801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200511500 + 200511501.

It is an arithmetic number, because the mean of its divisors is an integer number (200511501).

Almost surely, 2^401023001 is an apocalyptic number.

It is an amenable number.

401023001 is a deficient number, since it is larger than the sum of its proper divisors (1).

401023001 is an equidigital number, since it uses as much as digits as its factorization.

401023001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 401023001 is about 20025.5586938292. The cubic root of 401023001 is about 737.4338929925.

Adding to 401023001 its reverse (100320104), we get a palindrome (501343105).

The spelling of 401023001 in words is "four hundred one million, twenty-three thousand, one".