401249511 has 16 divisors (see below), whose sum is σ = 640170720. Its totient is φ = 246922560.

The previous prime is 401249507. The next prime is 401249557. The reversal of 401249511 is 115942104.

401249511 is a `hidden beast` number, since 401 + 249 + 5 + 11 = 666.

It is not a de Polignac number, because 401249511 - 2² = 401249507 is a prime.

It is a super-2 number, since 2×401249511² = 322002340155478242, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401249561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 571230 + ... + 571931.

It is an arithmetic number, because the mean of its divisors is an integer number (40010670).

Almost surely, 2^401249511 is an apocalyptic number.

401249511 is a deficient number, since it is larger than the sum of its proper divisors (238921209).

401249511 is a wasteful number, since it uses less digits than its factorization.

401249511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1143183 (or 1143177 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 401249511 is about 20031.2134180633. The cubic root of 401249511 is about 737.5727085646.

The spelling of 401249511 in words is "four hundred one million, two hundred forty-nine thousand, five hundred eleven".