401251 has 4 divisors (see below), whose sum is σ = 424872.
Its totient is φ = 377632.
The previous prime is 401243. The next prime is 401279. The reversal of 401251 is 152104.
Adding to 401251 its reverse (152104), we get a palindrome (553355).
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 401251 - 23 = 401243 is a prime.
It is a super-2 number, since 2×4012512 = 322004730002, which contains 22 as substring.
It is an Ulam number.
It is a Duffinian number.
401251 is a lucky number.
It is not an unprimeable number, because it can be changed into a prime (401201) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11785 + ... + 11818.
It is an arithmetic number, because the mean of its divisors is an integer number (106218).
2401251 is an apocalyptic number.
401251 is a deficient number, since it is larger than the sum of its proper divisors (23621).
401251 is a wasteful number, since it uses less digits than its factorization.
401251 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 23620.
The product of its (nonzero) digits is 40, while the sum is 13.
The square root of 401251 is about 633.4437623025.
The cubic root of 401251 is about 73.7573620918.
The spelling of 401251 in words is "four hundred one thousand, two hundred fifty-one".