401040135 has 24 divisors (see below), whose sum is σ = 708256224. Its totient is φ = 209851200.

The previous prime is 401040089. The next prime is 401040179. The reversal of 401040135 is 531040104.

It is a happy number.

It is not a de Polignac number, because 401040135 - 2⁹ = 401039623 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 81691 + ... + 86460.

It is an arithmetic number, because the mean of its divisors is an integer number (29510676).

Almost surely, 2^401040135 is an apocalyptic number.

401040135 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

401040135 is a deficient number, since it is larger than the sum of its proper divisors (307216089).

401040135 is a wasteful number, since it uses less digits than its factorization.

401040135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168215 (or 168212 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 401040135 is about 20025.9864925551. The cubic root of 401040135 is about 737.4443953098. Note that the first 3 decimals are identical.

Adding to 401040135 its reverse (531040104), we get a palindrome (932080239).

The spelling of 401040135 in words is "four hundred one million, forty thousand, one hundred thirty-five".