401520135 has 8 divisors (see below), whose sum is σ = 642432240. Its totient is φ = 214144064.

The previous prime is 401520113. The next prime is 401520143. The reversal of 401520135 is 531025104.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 401520135 - 2⁶ = 401520071 is a prime.

It is a super-2 number, since 2×401520135² = 322436837620836450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13383990 + ... + 13384019.

It is an arithmetic number, because the mean of its divisors is an integer number (80304030).

Almost surely, 2^401520135 is an apocalyptic number.

401520135 is a deficient number, since it is larger than the sum of its proper divisors (240912105).

401520135 is a wasteful number, since it uses less digits than its factorization.

401520135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26768017.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 401520135 is about 20037.9673370330. The cubic root of 401520135 is about 737.7384907137.

Adding to 401520135 its reverse (531025104), we get a palindrome (932545239).

The spelling of 401520135 in words is "four hundred one million, five hundred twenty thousand, one hundred thirty-five".