401277145 has 4 divisors (see below), whose sum is σ = 481532580. Its totient is φ = 321021712.

The previous prime is 401277077. The next prime is 401277157. The reversal of 401277145 is 541772104.

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 231131209 + 170145936 = 15203^2 + 13044^2 .

It is a cyclic number.

It is not a de Polignac number, because 401277145 - 2¹⁷ = 401146073 is a prime.

It is a super-2 number, since 2×401277145² = 322046694198702050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40127710 + ... + 40127719.

It is an arithmetic number, because the mean of its divisors is an integer number (120383145).

Almost surely, 2^401277145 is an apocalyptic number.

It is an amenable number.

401277145 is a deficient number, since it is larger than the sum of its proper divisors (80255435).

401277145 is an equidigital number, since it uses as much as digits as its factorization.

401277145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80255434.

The product of its (nonzero) digits is 7840, while the sum is 31.

The square root of 401277145 is about 20031.9031796782. The cubic root of 401277145 is about 737.5896403538.

The spelling of 401277145 in words is "four hundred one million, two hundred seventy-seven thousand, one hundred forty-five".