745555 has 4 divisors (see below), whose sum is σ = 894672. Its totient is φ = 596440.

The previous prime is 745543. The next prime is 745567. The reversal of 745555 is 555547.

745555 = 350² + 351² + ... + 355².

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 555547 = 347 ⋅1601.

It is an interprime number because it is at equal distance from previous prime (745543) and next prime (745567).

It is not a de Polignac number, because 745555 - 2¹¹ = 743507 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74551 + ... + 74560.

It is an arithmetic number, because the mean of its divisors is an integer number (223668).

2⁷⁴⁵⁵⁵⁵ is an apocalyptic number.

745555 is a deficient number, since it is larger than the sum of its proper divisors (149117).

745555 is a wasteful number, since it uses less digits than its factorization.

745555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149116.

The product of its digits is 17500, while the sum is 31.

The square root of 745555 is about 863.4552680944. The cubic root of 745555 is about 90.6761827406.

The spelling of 745555 in words is "seven hundred forty-five thousand, five hundred fifty-five".