401402111 has 4 divisors (see below), whose sum is σ = 437893224. Its totient is φ = 364911000.

The previous prime is 401402083. The next prime is 401402117. The reversal of 401402111 is 111204104.

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 401402111 - 2¹⁸ = 401139967 is a prime.

It is a super-2 number, since 2×401402111² = 322247309430512642, 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 (401402117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18245540 + ... + 18245561.

It is an arithmetic number, because the mean of its divisors is an integer number (109473306).

Almost surely, 2^401402111 is an apocalyptic number.

401402111 is a deficient number, since it is larger than the sum of its proper divisors (36491113).

401402111 is a wasteful number, since it uses less digits than its factorization.

401402111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36491112.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 401402111 is about 20035.0221112930. The cubic root of 401402111 is about 737.6661992952. Note that the first 3 decimals are identical.

Adding to 401402111 its reverse (111204104), we get a palindrome (512606215).

The spelling of 401402111 in words is "four hundred one million, four hundred two thousand, one hundred eleven".