742749 has 16 divisors (see below), whose sum is σ = 1145472. Its totient is φ = 419328.

The previous prime is 742723. The next prime is 742757. The reversal of 742749 is 947247.

It is not a de Polignac number, because 742749 - 2⁵ = 742717 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 742749.

It is not an unprimeable number, because it can be changed into a prime (742759) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2217 + ... + 2529.

It is an arithmetic number, because the mean of its divisors is an integer number (71592).

2⁷⁴²⁷⁴⁹ is an apocalyptic number.

It is an amenable number.

742749 is a deficient number, since it is larger than the sum of its proper divisors (402723).

742749 is a wasteful number, since it uses less digits than its factorization.

742749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436.

The product of its digits is 14112, while the sum is 33.

The square root of 742749 is about 861.8288693238. The cubic root of 742749 is about 90.5622822498.

The spelling of 742749 in words is "seven hundred forty-two thousand, seven hundred forty-nine".