742571 has 4 divisors (see below), whose sum is σ = 745992. Its totient is φ = 739152.

The previous prime is 742559. The next prime is 742579. The reversal of 742571 is 175247.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 175247 = 29 ⋅6043.

It is a cyclic number.

It is not a de Polignac number, because 742571 - 2⁶ = 742507 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 742571.

It is not an unprimeable number, because it can be changed into a prime (742579) 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 3 ways as a sum of consecutive naturals, for example, 1361 + ... + 1826.

It is an arithmetic number, because the mean of its divisors is an integer number (186498).

2⁷⁴²⁵⁷¹ is an apocalyptic number.

742571 is a deficient number, since it is larger than the sum of its proper divisors (3421).

742571 is a wasteful number, since it uses less digits than its factorization.

742571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3420.

The product of its digits is 1960, while the sum is 26.

The square root of 742571 is about 861.7255943745. The cubic root of 742571 is about 90.5550472466. Note that the first 3 decimals are identical.

The spelling of 742571 in words is "seven hundred forty-two thousand, five hundred seventy-one".