121689492 has 24 divisors (see below), whose sum is σ = 285852000. Its totient is φ = 40290336.

The previous prime is 121689457. The next prime is 121689497. The reversal of 121689492 is 294986121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121689497) 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, 32242 + ... + 35817.

It is an arithmetic number, because the mean of its divisors is an integer number (11910500).

Almost surely, 2^121689492 is an apocalyptic number.

121689492 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121689492 is an abundant number, since it is smaller than the sum of its proper divisors (164162508).

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

121689492 is a wasteful number, since it uses less digits than its factorization.

121689492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68215 (or 68213 counting only the distinct ones).

The product of its digits is 62208, while the sum is 42.

The square root of 121689492 is about 11031.2960253997. The cubic root of 121689492 is about 495.5464386939.

The spelling of 121689492 in words is "one hundred twenty-one million, six hundred eighty-nine thousand, four hundred ninety-two".