742218161 has 8 divisors (see below), whose sum is σ = 758724960. Its totient is φ = 725871168.

The previous prime is 742218143. The next prime is 742218173. The reversal of 742218161 is 161812247.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 742218161 - 2²² = 738023857 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (742218361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30536 + ... + 49161.

It is an arithmetic number, because the mean of its divisors is an integer number (94840620).

Almost surely, 2^742218161 is an apocalyptic number.

It is an amenable number.

742218161 is a deficient number, since it is larger than the sum of its proper divisors (16506799).

742218161 is a wasteful number, since it uses less digits than its factorization.

742218161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79903.

The product of its digits is 5376, while the sum is 32.

The square root of 742218161 is about 27243.6811205828. The cubic root of 742218161 is about 905.4070230435.

The spelling of 742218161 in words is "seven hundred forty-two million, two hundred eighteen thousand, one hundred sixty-one".