401010251 has 4 divisors (see below), whose sum is σ = 409542432. Its totient is φ = 392478072.

The previous prime is 401010227. The next prime is 401010271. The reversal of 401010251 is 152010104.

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 401010251 - 2¹⁴ = 400993867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401010271) 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, 4266020 + ... + 4266113.

It is an arithmetic number, because the mean of its divisors is an integer number (102385608).

Almost surely, 2^401010251 is an apocalyptic number.

401010251 is a deficient number, since it is larger than the sum of its proper divisors (8532181).

401010251 is an equidigital number, since it uses as much as digits as its factorization.

401010251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8532180.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 401010251 is about 20025.2403481207. The cubic root of 401010251 is about 737.4260776621.

Adding to 401010251 its reverse (152010104), we get a palindrome (553020355).

The spelling of 401010251 in words is "four hundred one million, ten thousand, two hundred fifty-one".