169121385 has 16 divisors (see below), whose sum is σ = 300660480. Its totient is φ = 90198000.

The previous prime is 169121371. The next prime is 169121411. The reversal of 169121385 is 583121961.

It is not a de Polignac number, because 169121385 - 2⁷ = 169121257 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 626241 + ... + 626510.

It is an arithmetic number, because the mean of its divisors is an integer number (18791280).

Almost surely, 2^169121385 is an apocalyptic number.

169121385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

169121385 is a deficient number, since it is larger than the sum of its proper divisors (131539095).

169121385 is a wasteful number, since it uses less digits than its factorization.

169121385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1252765 (or 1252759 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 169121385 is about 13004.6678158267. The cubic root of 169121385 is about 553.0098185905.

The spelling of 169121385 in words is "one hundred sixty-nine million, one hundred twenty-one thousand, three hundred eighty-five".