401294687 has 4 divisors (see below), whose sum is σ = 422415480. Its totient is φ = 380173896.

The previous prime is 401294657. The next prime is 401294693. The reversal of 401294687 is 786492104.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 401294687 - 2¹⁰ = 401293663 is a prime.

It is a super-2 number, since 2×401294687² = 322074851628855938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401294657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10560368 + ... + 10560405.

It is an arithmetic number, because the mean of its divisors is an integer number (105603870).

Almost surely, 2^401294687 is an apocalyptic number.

401294687 is a deficient number, since it is larger than the sum of its proper divisors (21120793).

401294687 is a wasteful number, since it uses less digits than its factorization.

401294687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21120792.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 401294687 is about 20032.3410264502. The cubic root of 401294687 is about 737.6003882114.

The spelling of 401294687 in words is "four hundred one million, two hundred ninety-four thousand, six hundred eighty-seven".