745430 has 32 divisors (see below), whose sum is σ = 1603584. Its totient is φ = 243936.

The previous prime is 745397. The next prime is 745471. The reversal of 745430 is 34547.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is an Ulam number.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 745396 and 745405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1379 + ... + 1841.

It is an arithmetic number, because the mean of its divisors is an integer number (50112).

2⁷⁴⁵⁴³⁰ is an apocalyptic number.

745430 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

745430 is an abundant number, since it is smaller than the sum of its proper divisors (858154).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

745430 is a wasteful number, since it uses less digits than its factorization.

745430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500.

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 745430 is about 863.3828814611. The cubic root of 745430 is about 90.6711148577.

Adding to 745430 its reverse (34547), we get a palindrome (779977).

The spelling of 745430 in words is "seven hundred forty-five thousand, four hundred thirty".