401244139 has 2 divisors, whose sum is σ = 401244140. Its totient is φ = 401244138.

The previous prime is 401244101. The next prime is 401244143. The reversal of 401244139 is 931442104.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 401244139 - 2¹⁷ = 401113067 is a prime.

It is not a weakly prime, because it can be changed into another prime (401244839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200622069 + 200622070.

It is an arithmetic number, because the mean of its divisors is an integer number (200622070).

Almost surely, 2^401244139 is an apocalyptic number.

401244139 is a deficient number, since it is larger than the sum of its proper divisors (1).

401244139 is an equidigital number, since it uses as much as digits as its factorization.

401244139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 401244139 is about 20031.0793268860. The cubic root of 401244139 is about 737.5694169649.

The spelling of 401244139 in words is "four hundred one million, two hundred forty-four thousand, one hundred thirty-nine".