745431 has 4 divisors (see below), whose sum is σ = 993912. Its totient is φ = 496952.

The previous prime is 745397. The next prime is 745471. The reversal of 745431 is 134547.

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 745431 - 2¹⁰ = 744407 is a prime.

It is a super-2 number, since 2×745431² = 1111334751522, which contains 22 as substring.

It is a D-number.

745431 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (745471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124236 + ... + 124241.

It is an arithmetic number, because the mean of its divisors is an integer number (248478).

2⁷⁴⁵⁴³¹ is an apocalyptic number.

745431 is a deficient number, since it is larger than the sum of its proper divisors (248481).

745431 is a wasteful number, since it uses less digits than its factorization.

745431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248480.

The product of its digits is 1680, while the sum is 24.

The square root of 745431 is about 863.3834605782. The cubic root of 745431 is about 90.6711554030.

Adding to 745431 its reverse (134547), we get a palindrome (879978).

It can be divided in two parts, 745 and 431, that added together give a triangular number (1176 = T₄₈).

The spelling of 745431 in words is "seven hundred forty-five thousand, four hundred thirty-one".