12261375 has 80 divisors (see below), whose sum is σ = 26275392. Its totient is φ = 5572800.

The previous prime is 12261373. The next prime is 12261383. The reversal of 12261375 is 57316221.

It is a happy number.

It is not a de Polignac number, because 12261375 - 2¹ = 12261373 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12261371) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 70789 + ... + 70961.

Almost surely, 2^12261375 is an apocalyptic number.

12261375 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12261375 is an abundant number, since it is smaller than the sum of its proper divisors (14014017).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12261375 is an equidigital number, since it uses as much as digits as its factorization.

12261375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207 (or 188 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 12261375 is about 3501.6246229429. The cubic root of 12261375 is about 230.5931445194.

Adding to 12261375 its reverse (57316221), we get a palindrome (69577596).

It can be divided in two parts, 1226 and 1375, that added together give a square (2601 = 51²).

The spelling of 12261375 in words is "twelve million, two hundred sixty-one thousand, three hundred seventy-five".