401142109 has 2 divisors, whose sum is σ = 401142110. Its totient is φ = 401142108.

The previous prime is 401142101. The next prime is 401142143. The reversal of 401142109 is 901241104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 294019609 + 107122500 = 17147^2 + 10350^2 .

It is a cyclic number.

It is not a de Polignac number, because 401142109 - 2³ = 401142101 is a prime.

It is a super-2 number, since 2×401142109² = 321829983225935762, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 401142109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401142101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200571054 + 200571055.

It is an arithmetic number, because the mean of its divisors is an integer number (200571055).

Almost surely, 2^401142109 is an apocalyptic number.

It is an amenable number.

401142109 is a deficient number, since it is larger than the sum of its proper divisors (1).

401142109 is an equidigital number, since it uses as much as digits as its factorization.

401142109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 401142109 is about 20028.5323725929. The cubic root of 401142109 is about 737.5068942763.

The spelling of 401142109 in words is "four hundred one million, one hundred forty-two thousand, one hundred nine".