740842 has 4 divisors (see below), whose sum is σ = 1111266. Its totient is φ = 370420.

The previous prime is 740801. The next prime is 740849. The reversal of 740842 is 248047.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 248047 = 17 ⋅14591.

It can be written as a sum of positive squares in only one way, i.e., 724201 + 16641 = 851^2 + 129^2 .

It is not an unprimeable number, because it can be changed into a prime (740849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 185209 + ... + 185212.

2⁷⁴⁰⁸⁴² is an apocalyptic number.

740842 is a deficient number, since it is larger than the sum of its proper divisors (370424).

740842 is a wasteful number, since it uses less digits than its factorization.

740842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370423.

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 740842 is about 860.7217901273. The cubic root of 740842 is about 90.4847099307.

Adding to 740842 its reverse (248047), we get a palindrome (988889).

The spelling of 740842 in words is "seven hundred forty thousand, eight hundred forty-two".