745571 has 4 divisors (see below), whose sum is σ = 756144. Its totient is φ = 735000.

The previous prime is 745567. The next prime is 745573. The reversal of 745571 is 175547.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 175547 = 349 ⋅503.

It is a cyclic number.

It is not a de Polignac number, because 745571 - 2² = 745567 is a prime.

It is a super-3 number, since 3×745571³ = 1243335335138413233, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (745573) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5180 + ... + 5321.

It is an arithmetic number, because the mean of its divisors is an integer number (189036).

2⁷⁴⁵⁵⁷¹ is an apocalyptic number.

745571 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

745571 is a deficient number, since it is larger than the sum of its proper divisors (10573).

745571 is a wasteful number, since it uses less digits than its factorization.

745571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10572.

The product of its digits is 4900, while the sum is 29.

The square root of 745571 is about 863.4645331454. The cubic root of 745571 is about 90.6768313887.

The spelling of 745571 in words is "seven hundred forty-five thousand, five hundred seventy-one".