404451 has 6 divisors (see below), whose sum is σ = 584220. Its totient is φ = 269628.

The previous prime is 404449. The next prime is 404461. The reversal of 404451 is 154404.

It is not a de Polignac number, because 404451 - 2¹ = 404449 is a prime.

It is a super-2 number, since 2×404451² = 327161222802, which contains 22 as substring.

404451 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (404431) 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 5 ways as a sum of consecutive naturals, for example, 22461 + ... + 22478.

It is an arithmetic number, because the mean of its divisors is an integer number (97370).

2⁴⁰⁴⁴⁵¹ is an apocalyptic number.

404451 is a deficient number, since it is larger than the sum of its proper divisors (179769).

404451 is a wasteful number, since it uses less digits than its factorization.

404451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44945 (or 44942 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 404451 is about 635.9646216575. The cubic root of 404451 is about 73.9529162379.

Adding to 404451 its reverse (154404), we get a palindrome (558855).

Subtracting from 404451 its reverse (154404), we obtain a cube (250047 = 63³).

It can be divided in two parts, 4044 and 51, that added together give a triangular number (4095 = T₉₀).

The spelling of 404451 in words is "four hundred four thousand, four hundred fifty-one".