742121903 has 4 divisors (see below), whose sum is σ = 745362840. Its totient is φ = 738880968.

The previous prime is 742121899. The next prime is 742121917. The reversal of 742121903 is 309121247.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 742121903 - 2² = 742121899 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 (742121983) 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, 1620125 + ... + 1620582.

It is an arithmetic number, because the mean of its divisors is an integer number (186340710).

Almost surely, 2^742121903 is an apocalyptic number.

742121903 is a deficient number, since it is larger than the sum of its proper divisors (3240937).

742121903 is a wasteful number, since it uses less digits than its factorization.

742121903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3240936.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 742121903 is about 27241.9144518149. The cubic root of 742121903 is about 905.3678807169.

The spelling of 742121903 in words is "seven hundred forty-two million, one hundred twenty-one thousand, nine hundred three".