121560290 has 32 divisors (see below), whose sum is σ = 240347520. Its totient is φ = 44060544.

The previous prime is 121560289. The next prime is 121560317. The reversal of 121560290 is 92065121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9539 + ... + 18278.

It is an arithmetic number, because the mean of its divisors is an integer number (7510860).

Almost surely, 2^121560290 is an apocalyptic number.

121560290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121560290 is a deficient number, since it is larger than the sum of its proper divisors (118787230).

121560290 is a wasteful number, since it uses less digits than its factorization.

121560290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27866.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 121560290 is about 11025.4383132826. The cubic root of 121560290 is about 495.3709969125.

The spelling of 121560290 in words is "one hundred twenty-one million, five hundred sixty thousand, two hundred ninety".