401493 has 4 divisors (see below), whose sum is σ = 535328. Its totient is φ = 267660.

The previous prime is 401477. The next prime is 401507. The reversal of 401493 is 394104.

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 not a de Polignac number, because 401493 - 2⁴ = 401477 is a prime.

It is a super-2 number, since 2×401493² = 322393258098, which contains 22 as substring.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66913 + ... + 66918.

It is an arithmetic number, because the mean of its divisors is an integer number (133832).

2⁴⁰¹⁴⁹³ is an apocalyptic number.

It is an amenable number.

401493 is a deficient number, since it is larger than the sum of its proper divisors (133835).

401493 is a wasteful number, since it uses less digits than its factorization.

401493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133834.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 401493 is about 633.6347528348. The cubic root of 401493 is about 73.7721871385.

Adding to 401493 its reverse (394104), we get a palindrome (795597).

The spelling of 401493 in words is "four hundred one thousand, four hundred ninety-three".