385772121 has 24 divisors (see below), whose sum is σ = 641426240. Its totient is φ = 218850336.

The previous prime is 385772119. The next prime is 385772161. The reversal of 385772121 is 121277583.

It is not a de Polignac number, because 385772121 - 2¹ = 385772119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (385772111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13270 + ... + 30783.

Almost surely, 2^385772121 is an apocalyptic number.

It is an amenable number.

385772121 is a deficient number, since it is larger than the sum of its proper divisors (255654119).

385772121 is a wasteful number, since it uses less digits than its factorization.

385772121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44205 (or 44202 counting only the distinct ones).

The product of its digits is 23520, while the sum is 36.

The square root of 385772121 is about 19641.0824803522. The cubic root of 385772121 is about 727.9646318053.

The spelling of 385772121 in words is "three hundred eighty-five million, seven hundred seventy-two thousand, one hundred twenty-one".