121661774 has 16 divisors (see below), whose sum is σ = 196756560. Its totient is φ = 56087040.

The previous prime is 121661759. The next prime is 121661777. The reversal of 121661774 is 477166121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121661777) 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, 26222 + ... + 30510.

It is an arithmetic number, because the mean of its divisors is an integer number (12297285).

Almost surely, 2^121661774 is an apocalyptic number.

121661774 is a deficient number, since it is larger than the sum of its proper divisors (75094786).

121661774 is a wasteful number, since it uses less digits than its factorization.

121661774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5395.

The product of its digits is 14112, while the sum is 35.

The square root of 121661774 is about 11030.0396191492. The cubic root of 121661774 is about 495.5088112346.

The spelling of 121661774 in words is "one hundred twenty-one million, six hundred sixty-one thousand, seven hundred seventy-four".