445431 has 8 divisors (see below), whose sum is σ = 678784. Its totient is φ = 254520.

The previous prime is 445427. The next prime is 445433. The reversal of 445431 is 134544.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 445431 - 2² = 445427 is a prime.

It is a super-2 number, since 2×445431² = 396817551522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 21211 = 445431 / (4 + 4 + 5 + 4 + 3 + 1).

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 445398 and 445407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10585 + ... + 10626.

It is an arithmetic number, because the mean of its divisors is an integer number (84848).

2⁴⁴⁵⁴³¹ is an apocalyptic number.

445431 is a deficient number, since it is larger than the sum of its proper divisors (233353).

445431 is a wasteful number, since it uses less digits than its factorization.

445431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21221.

The product of its digits is 960, while the sum is 21.

The square root of 445431 is about 667.4061731809. The cubic root of 445431 is about 76.3707073178.

Adding to 445431 its reverse (134544), we get a palindrome (579975).

It can be divided in two parts, 44543 and 1, that added together give a palindrome (44544).

The spelling of 445431 in words is "four hundred forty-five thousand, four hundred thirty-one".