121545377 has 4 divisors (see below), whose sum is σ = 123838740. Its totient is φ = 119252016.

The previous prime is 121545343. The next prime is 121545379. The reversal of 121545377 is 773545121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 773545121 = 1861 ⋅415661.

It can be written as a sum of positive squares in 2 ways, for example, as 75359761 + 46185616 = 8681^2 + 6796^2 .

It is a cyclic number.

It is not a de Polignac number, because 121545377 - 2¹² = 121541281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121545379) 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, 1146602 + ... + 1146707.

It is an arithmetic number, because the mean of its divisors is an integer number (30959685).

Almost surely, 2^121545377 is an apocalyptic number.

It is an amenable number.

121545377 is a deficient number, since it is larger than the sum of its proper divisors (2293363).

121545377 is an equidigital number, since it uses as much as digits as its factorization.

121545377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2293362.

The product of its digits is 29400, while the sum is 35.

The square root of 121545377 is about 11024.7619928958. The cubic root of 121545377 is about 495.3507387350.

The spelling of 121545377 in words is "one hundred twenty-one million, five hundred forty-five thousand, three hundred seventy-seven".