401280111 has 12 divisors (see below), whose sum is σ = 579800520. Its totient is φ = 267439920.

The previous prime is 401280109. The next prime is 401280137. The reversal of 401280111 is 111082104.

It is not a de Polignac number, because 401280111 - 2¹ = 401280109 is a prime.

It is a super-2 number, since 2×401280111² = 322051454968344642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401280101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54985 + ... + 61853.

It is an arithmetic number, because the mean of its divisors is an integer number (48316710).

Almost surely, 2^401280111 is an apocalyptic number.

401280111 is a deficient number, since it is larger than the sum of its proper divisors (178520409).

401280111 is a wasteful number, since it uses less digits than its factorization.

401280111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13366 (or 13363 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

The square root of 401280111 is about 20031.9772114487. The cubic root of 401280111 is about 737.5914576227.

The spelling of 401280111 in words is "four hundred one million, two hundred eighty thousand, one hundred eleven".