742340549 has 4 divisors (see below), whose sum is σ = 746442060. Its totient is φ = 738239040.

The previous prime is 742340483. The next prime is 742340561. The reversal of 742340549 is 945043247.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 945043247 = 743 ⋅1271929.

It can be written as a sum of positive squares in 2 ways, for example, as 247055524 + 495285025 = 15718^2 + 22255^2 .

It is a cyclic number.

It is not a de Polignac number, because 742340549 - 2²⁸ = 473905093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (742340149) 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, 2050484 + ... + 2050845.

It is an arithmetic number, because the mean of its divisors is an integer number (186610515).

Almost surely, 2^742340549 is an apocalyptic number.

It is an amenable number.

742340549 is a deficient number, since it is larger than the sum of its proper divisors (4101511).

742340549 is a wasteful number, since it uses less digits than its factorization.

742340549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4101510.

The product of its (nonzero) digits is 120960, while the sum is 38.

The square root of 742340549 is about 27245.9272002257. The cubic root of 742340549 is about 905.4567859795.

The spelling of 742340549 in words is "seven hundred forty-two million, three hundred forty thousand, five hundred forty-nine".