742240 has 24 divisors (see below), whose sum is σ = 1753920. Its totient is φ = 296832.

The previous prime is 742229. The next prime is 742241. The reversal of 742240 is 42247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (742241) 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, 2160 + ... + 2479.

It is an arithmetic number, because the mean of its divisors is an integer number (73080).

2⁷⁴²²⁴⁰ is an apocalyptic number.

It is an amenable number.

742240 is an abundant number, since it is smaller than the sum of its proper divisors (1011680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

742240 is a wasteful number, since it uses less digits than its factorization.

742240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4654 (or 4646 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 19.

The square root of 742240 is about 861.5335164693. The cubic root of 742240 is about 90.5415903177.

Adding to 742240 its reverse (42247), we get a palindrome (784487).

The spelling of 742240 in words is "seven hundred forty-two thousand, two hundred forty", and thus it is an iban number.