745290 has 108 divisors (see below), whose sum is σ = 2440854. Its totient is φ = 157248.

The previous prime is 745273. The next prime is 745301. The reversal of 745290 is 92547.

It can be written as a sum of positive squares in 3 ways, for example, as 321489 + 423801 = 567^2 + 651^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 57324 + ... + 57336.

2⁷⁴⁵²⁹⁰ is an apocalyptic number.

745290 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 745290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1220427).

745290 is an abundant number, since it is smaller than the sum of its proper divisors (1695564).

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

745290 is a wasteful number, since it uses less digits than its factorization.

745290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53 (or 30 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 745290 is about 863.3018012260. The cubic root of 745290 is about 90.6654381562.

It can be divided in two parts, 745 and 290, that added together give a triangular number (1035 = T₄₅).

The spelling of 745290 in words is "seven hundred forty-five thousand, two hundred ninety".