16121245 has 24 divisors (see below), whose sum is σ = 23290200. Its totient is φ = 10668672.

The previous prime is 16121243. The next prime is 16121249. The reversal of 16121245 is 54212161.

It can be written as a sum of positive squares in 4 ways, for example, as 33124 + 16088121 = 182^2 + 4011^2 .

It is not a de Polignac number, because 16121245 - 2¹ = 16121243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16121243) 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, 5971 + ... + 8239.

It is an arithmetic number, because the mean of its divisors is an integer number (970425).

Almost surely, 2^16121245 is an apocalyptic number.

It is an amenable number.

16121245 is a deficient number, since it is larger than the sum of its proper divisors (7168955).

16121245 is a wasteful number, since it uses less digits than its factorization.

16121245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2317 (or 2310 counting only the distinct ones).

The product of its digits is 480, while the sum is 22.

The square root of 16121245 is about 4015.1270216520. The cubic root of 16121245 is about 252.6191053288.

The spelling of 16121245 in words is "sixteen million, one hundred twenty-one thousand, two hundred forty-five".