121669158 has 32 divisors (see below), whose sum is σ = 262676736. Its totient is φ = 37348128.

The previous prime is 121669157. The next prime is 121669159. The reversal of 121669158 is 851966121.

It is an interprime number because it is at equal distance from previous prime (121669157) and next prime (121669159).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121669157) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36385 + ... + 39587.

It is an arithmetic number, because the mean of its divisors is an integer number (8208648).

Almost surely, 2^121669158 is an apocalyptic number.

121669158 is an abundant number, since it is smaller than the sum of its proper divisors (141007578).

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

121669158 is a wasteful number, since it uses less digits than its factorization.

121669158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3708.

The product of its digits is 25920, while the sum is 39.

The square root of 121669158 is about 11030.3743363496. The cubic root of 121669158 is about 495.5188356461.

The spelling of 121669158 in words is "one hundred twenty-one million, six hundred sixty-nine thousand, one hundred fifty-eight".