121545770 has 16 divisors (see below), whose sum is σ = 220358880. Its totient is φ = 48267984.

The previous prime is 121545769. The next prime is 121545811. The reversal of 121545770 is 77545121.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42332 + ... + 45111.

It is an arithmetic number, because the mean of its divisors is an integer number (13772430).

Almost surely, 2^121545770 is an apocalyptic number.

121545770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121545770 is a deficient number, since it is larger than the sum of its proper divisors (98813110).

121545770 is a wasteful number, since it uses less digits than its factorization.

121545770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87589.

The product of its (nonzero) digits is 9800, while the sum is 32.

The square root of 121545770 is about 11024.7798163954. The cubic root of 121545770 is about 495.3512726169.

The spelling of 121545770 in words is "one hundred twenty-one million, five hundred forty-five thousand, seven hundred seventy".