745240 has 32 divisors (see below), whose sum is σ = 1733760. Its totient is φ = 288000.

The previous prime is 745231. The next prime is 745243. The reversal of 745240 is 42547.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (745243) 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 7 ways as a sum of consecutive naturals, for example, 940 + ... + 1540.

It is an arithmetic number, because the mean of its divisors is an integer number (54180).

2⁷⁴⁵²⁴⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 745240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (866880).

745240 is an abundant number, since it is smaller than the sum of its proper divisors (988520).

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

745240 is a wasteful number, since it uses less digits than its factorization.

745240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643 (or 639 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 22.

The square root of 745240 is about 863.2728421536. The cubic root of 745240 is about 90.6634105905.

Adding to 745240 its reverse (42547), we get a palindrome (787787).

The spelling of 745240 in words is "seven hundred forty-five thousand, two hundred forty".