742906 has 4 divisors (see below), whose sum is σ = 1114362. Its totient is φ = 371452.

The previous prime is 742897. The next prime is 742909. The reversal of 742906 is 609247.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 609247 = 23 ⋅26489.

It can be written as a sum of positive squares in only one way, i.e., 731025 + 11881 = 855^2 + 109^2 .

It is not an unprimeable number, because it can be changed into a prime (742909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 185725 + ... + 185728.

2⁷⁴²⁹⁰⁶ is an apocalyptic number.

742906 is a deficient number, since it is larger than the sum of its proper divisors (371456).

742906 is a wasteful number, since it uses less digits than its factorization.

742906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371455.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 742906 is about 861.9199498793. The cubic root of 742906 is about 90.5686627258.

The spelling of 742906 in words is "seven hundred forty-two thousand, nine hundred six".