742545 has 24 divisors (see below), whose sum is σ = 1333800. Its totient is φ = 381696.

The previous prime is 742541. The next prime is 742549. The reversal of 742545 is 545247.

It is an interprime number because it is at equal distance from previous prime (742541) and next prime (742549).

It can be written as a sum of positive squares in 4 ways, for example, as 16641 + 725904 = 129^2 + 852^2 .

It is not a de Polignac number, because 742545 - 2² = 742541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (742541) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1021 + ... + 1589.

It is an arithmetic number, because the mean of its divisors is an integer number (55575).

2⁷⁴²⁵⁴⁵ is an apocalyptic number.

It is an amenable number.

742545 is a deficient number, since it is larger than the sum of its proper divisors (591255).

742545 is a wasteful number, since it uses less digits than its factorization.

742545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609 (or 606 counting only the distinct ones).

The product of its digits is 5600, while the sum is 27.

The square root of 742545 is about 861.7105082335. The cubic root of 742545 is about 90.5539903516.

The spelling of 742545 in words is "seven hundred forty-two thousand, five hundred forty-five".