121650645 has 8 divisors (see below), whose sum is σ = 194641056. Its totient is φ = 64880336.

The previous prime is 121650637. The next prime is 121650667. The reversal of 121650645 is 546056121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121650645 - 2³ = 121650637 is a prime.

It is a congruent number.

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, 4055007 + ... + 4055036.

It is an arithmetic number, because the mean of its divisors is an integer number (24330132).

Almost surely, 2^121650645 is an apocalyptic number.

121650645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121650645 is a deficient number, since it is larger than the sum of its proper divisors (72990411).

121650645 is an equidigital number, since it uses as much as digits as its factorization.

121650645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8110051.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 121650645 is about 11029.5351216631. The cubic root of 121650645 is about 495.4937018990.

The spelling of 121650645 in words is "one hundred twenty-one million, six hundred fifty thousand, six hundred forty-five".