401265641 has 4 divisors (see below), whose sum is σ = 458589312. Its totient is φ = 343941972.

The previous prime is 401265619. The next prime is 401265661. The reversal of 401265641 is 146562104.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-401265641 is a prime.

It is a super-2 number, since 2×401265641² = 322028229294281762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401265611) 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, 28661825 + ... + 28661838.

It is an arithmetic number, because the mean of its divisors is an integer number (114647328).

Almost surely, 2^401265641 is an apocalyptic number.

It is an amenable number.

401265641 is a deficient number, since it is larger than the sum of its proper divisors (57323671).

401265641 is an equidigital number, since it uses as much as digits as its factorization.

401265641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57323670.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 401265641 is about 20031.6160356572. The cubic root of 401265641 is about 737.5825917653.

The spelling of 401265641 in words is "four hundred one million, two hundred sixty-five thousand, six hundred forty-one".