121273157 has 8 divisors (see below), whose sum is σ = 125837400. Its totient is φ = 116734464.

The previous prime is 121273151. The next prime is 121273171. The reversal of 121273157 is 751372121.

It can be written as a sum of positive squares in 4 ways, for example, as 75076 + 121198081 = 274^2 + 11009^2 .

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 121273157 - 2¹⁰ = 121272133 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 3569 + ... + 15977.

It is an arithmetic number, because the mean of its divisors is an integer number (15729675).

Almost surely, 2^121273157 is an apocalyptic number.

It is an amenable number.

121273157 is a deficient number, since it is larger than the sum of its proper divisors (4564243).

121273157 is a wasteful number, since it uses less digits than its factorization.

121273157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12775.

The product of its digits is 2940, while the sum is 29.

The square root of 121273157 is about 11012.4092277757. The cubic root of 121273157 is about 494.9806570002.

The spelling of 121273157 in words is "one hundred twenty-one million, two hundred seventy-three thousand, one hundred fifty-seven".