401134021 has 4 divisors (see below), whose sum is σ = 402270732. Its totient is φ = 399997312.

The previous prime is 401133919. The next prime is 401134031. The reversal of 401134021 is 120431104.

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

It can be written as a sum of positive squares in 2 ways, for example, as 328116996 + 73017025 = 18114^2 + 8545^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-401134021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 401133986 and 401134004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401134031) 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, 567826 + ... + 568531.

It is an arithmetic number, because the mean of its divisors is an integer number (100567683).

Almost surely, 2^401134021 is an apocalyptic number.

It is an amenable number.

401134021 is a deficient number, since it is larger than the sum of its proper divisors (1136711).

401134021 is a wasteful number, since it uses less digits than its factorization.

401134021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1136710.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 401134021 is about 20028.3304596264. The cubic root of 401134021 is about 737.5019375990.

Adding to 401134021 its reverse (120431104), we get a palindrome (521565125).

The spelling of 401134021 in words is "four hundred one million, one hundred thirty-four thousand, twenty-one".