121545607 has 4 divisors (see below), whose sum is σ = 124510176. Its totient is φ = 118581040.

The previous prime is 121545569. The next prime is 121545617. The reversal of 121545607 is 706545121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121545607 - 2¹⁹ = 121021319 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121545617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1482223 + ... + 1482304.

It is an arithmetic number, because the mean of its divisors is an integer number (31127544).

Almost surely, 2^121545607 is an apocalyptic number.

121545607 is a deficient number, since it is larger than the sum of its proper divisors (2964569).

121545607 is an equidigital number, since it uses as much as digits as its factorization.

121545607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2964568.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 121545607 is about 11024.7724239551. The cubic root of 121545607 is about 495.3510511851.

The spelling of 121545607 in words is "one hundred twenty-one million, five hundred forty-five thousand, six hundred seven".