745551 has 16 divisors (see below), whose sum is σ = 1127520. Its totient is φ = 486720.

The previous prime is 745543. The next prime is 745567. The reversal of 745551 is 155547.

745551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 745551 - 2³ = 745543 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (745531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1171 + ... + 1691.

It is an arithmetic number, because the mean of its divisors is an integer number (70470).

2⁷⁴⁵⁵⁵¹ is an apocalyptic number.

745551 is a deficient number, since it is larger than the sum of its proper divisors (381969).

745551 is a wasteful number, since it uses less digits than its factorization.

745551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583 (or 577 counting only the distinct ones).

The product of its digits is 3500, while the sum is 27.

The square root of 745551 is about 863.4529518161. The cubic root of 745551 is about 90.6760205771.

It can be divided in two parts, 745 and 551, that added together give a 4-th power (1296 = 6⁴).

The spelling of 745551 in words is "seven hundred forty-five thousand, five hundred fifty-one".