12152405 has 6 divisors (see below), whose sum is σ = 14592246. Its totient is φ = 9715688.

The previous prime is 12152401. The next prime is 12152411. The reversal of 12152405 is 50425121.

It can be written as a sum of positive squares in only one way, i.e., 9721924 + 2430481 = 3118^2 + 1559^2 .

It is not a de Polignac number, because 12152405 - 2² = 12152401 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 (12152401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7016 + ... + 8574.

It is an arithmetic number, because the mean of its divisors is an integer number (2432041).

Almost surely, 2^12152405 is an apocalyptic number.

It is an amenable number.

12152405 is a deficient number, since it is larger than the sum of its proper divisors (2439841).

12152405 is an frugal number, since it uses more digits than its factorization.

12152405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3123 (or 1564 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 12152405 is about 3486.0299769222. The cubic root of 12152405 is about 229.9079972292.

Multiplying 12152405 by its sum of digits (20), we get a square (243048100 = 15590²).

Adding to 12152405 its reverse (50425121), we get a palindrome (62577526).

The spelling of 12152405 in words is "twelve million, one hundred fifty-two thousand, four hundred five".