121273158 has 64 divisors (see below), whose sum is σ = 262766592. Its totient is φ = 37218720.

The previous prime is 121273151. The next prime is 121273171. The reversal of 121273158 is 851372121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121273151) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 634843 + ... + 635033.

It is an arithmetic number, because the mean of its divisors is an integer number (4105728).

Almost surely, 2^121273158 is an apocalyptic number.

121273158 is an abundant number, since it is smaller than the sum of its proper divisors (141493434).

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

121273158 is a wasteful number, since it uses less digits than its factorization.

121273158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369.

The product of its digits is 3360, while the sum is 30.

The square root of 121273158 is about 11012.4092731791. The cubic root of 121273158 is about 494.9806583607.

The spelling of 121273158 in words is "one hundred twenty-one million, two hundred seventy-three thousand, one hundred fifty-eight".