12261355 has 4 divisors (see below), whose sum is σ = 14713632. Its totient is φ = 9809080.

The previous prime is 12261331. The next prime is 12261371. The reversal of 12261355 is 55316221.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 12261355 - 2¹¹ = 12259307 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1226131 + ... + 1226140.

It is an arithmetic number, because the mean of its divisors is an integer number (3678408).

Almost surely, 2^12261355 is an apocalyptic number.

12261355 is a deficient number, since it is larger than the sum of its proper divisors (2452277).

12261355 is an equidigital number, since it uses as much as digits as its factorization.

12261355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2452276.

The product of its digits is 1800, while the sum is 25.

The square root of 12261355 is about 3501.6217671245. The cubic root of 12261355 is about 230.5930191429.

Adding to 12261355 its reverse (55316221), we get a palindrome (67577576).

It can be divided in two parts, 12 and 261355, that multiplied together give a triangular number (3136260 = T₂₅₀₄).

The spelling of 12261355 in words is "twelve million, two hundred sixty-one thousand, three hundred fifty-five".