121727142 has 24 divisors (see below), whose sum is σ = 272251200. Its totient is φ = 39266640.

The previous prime is 121727131. The next prime is 121727149. The reversal of 121727142 is 241727121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121727149) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 108517 + ... + 109632.

It is an arithmetic number, because the mean of its divisors is an integer number (11343800).

Almost surely, 2^121727142 is an apocalyptic number.

121727142 is an abundant number, since it is smaller than the sum of its proper divisors (150524058).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121727142 is a wasteful number, since it uses less digits than its factorization.

121727142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218188 (or 218185 counting only the distinct ones).

The product of its digits is 1568, while the sum is 27.

The square root of 121727142 is about 11033.0024018850. The cubic root of 121727142 is about 495.5975397908.

The spelling of 121727142 in words is "one hundred twenty-one million, seven hundred twenty-seven thousand, one hundred forty-two".