742505 has 4 divisors (see below), whose sum is σ = 891012. Its totient is φ = 594000.

The previous prime is 742499. The next prime is 742507. The reversal of 742505 is 505247.

742505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 505247 = 67 ⋅7541.

It can be written as a sum of positive squares in 2 ways, for example, as 212521 + 529984 = 461^2 + 728^2 .

It is a de Polignac number, because none of the positive numbers 2^k-742505 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (742507) 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, 74246 + ... + 74255.

It is an arithmetic number, because the mean of its divisors is an integer number (222753).

2⁷⁴²⁵⁰⁵ is an apocalyptic number.

It is an amenable number.

742505 is a deficient number, since it is larger than the sum of its proper divisors (148507).

742505 is a wasteful number, since it uses less digits than its factorization.

742505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148506.

The product of its (nonzero) digits is 1400, while the sum is 23.

The square root of 742505 is about 861.6872982701. The cubic root of 742505 is about 90.5523643111.

The spelling of 742505 in words is "seven hundred forty-two thousand, five hundred five".