121860556 has 24 divisors (see below), whose sum is σ = 227813040. Its totient is φ = 56835072.

The previous prime is 121860553. The next prime is 121860559. The reversal of 121860556 is 655068121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (121860553) and next prime (121860559).

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (121860553) 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, 246 + ... + 15613.

It is an arithmetic number, because the mean of its divisors is an integer number (9492210).

Almost surely, 2^121860556 is an apocalyptic number.

It is an amenable number.

121860556 is a deficient number, since it is larger than the sum of its proper divisors (105952484).

121860556 is a wasteful number, since it uses less digits than its factorization.

121860556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15993 (or 15991 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 121860556 is about 11039.0468791468. The cubic root of 121860556 is about 495.7785334128.

The spelling of 121860556 in words is "one hundred twenty-one million, eight hundred sixty thousand, five hundred fifty-six".