121945142 has 8 divisors (see below), whose sum is σ = 199546632. Its totient is φ = 55429600.

The previous prime is 121945139. The next prime is 121945147. The reversal of 121945142 is 241549121.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121945147) 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, 2771459 + ... + 2771502.

It is an arithmetic number, because the mean of its divisors is an integer number (24943329).

Almost surely, 2^121945142 is an apocalyptic number.

121945142 is a deficient number, since it is larger than the sum of its proper divisors (77601490).

121945142 is a wasteful number, since it uses less digits than its factorization.

121945142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5542974.

The product of its digits is 2880, while the sum is 29.

The square root of 121945142 is about 11042.8774329882. The cubic root of 121945142 is about 495.8932170186.

The spelling of 121945142 in words is "one hundred twenty-one million, nine hundred forty-five thousand, one hundred forty-two".