742990 has 16 divisors (see below), whose sum is σ = 1347840. Its totient is φ = 294880.

The previous prime is 742981. The next prime is 742991. The reversal of 742990 is 99247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (742991) by changing a digit.

742990 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1716 + ... + 2104.

It is an arithmetic number, because the mean of its divisors is an integer number (84240).

2⁷⁴²⁹⁹⁰ is an apocalyptic number.

742990 is a deficient number, since it is larger than the sum of its proper divisors (604850).

742990 is a wasteful number, since it uses less digits than its factorization.

742990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 587.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 742990 is about 861.9686769251. The cubic root of 742990 is about 90.5720761146.

The spelling of 742990 in words is "seven hundred forty-two thousand, nine hundred ninety".