11827945 has 4 divisors (see below), whose sum is σ = 14193540. Its totient is φ = 9462352.

The previous prime is 11827943. The next prime is 11827987. The reversal of 11827945 is 54972811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54972811 = 331 ⋅166081.

It can be written as a sum of positive squares in 2 ways, for example, as 5517801 + 6310144 = 2349^2 + 2512^2 .

It is a cyclic number.

It is not a de Polignac number, because 11827945 - 2¹ = 11827943 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11827943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1182790 + ... + 1182799.

It is an arithmetic number, because the mean of its divisors is an integer number (3548385).

Almost surely, 2^11827945 is an apocalyptic number.

It is an amenable number.

11827945 is a deficient number, since it is larger than the sum of its proper divisors (2365595).

11827945 is an equidigital number, since it uses as much as digits as its factorization.

11827945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2365594.

The product of its digits is 20160, while the sum is 37.

The square root of 11827945 is about 3439.1779541047. The cubic root of 11827945 is about 227.8433891672.

The spelling of 11827945 in words is "eleven million, eight hundred twenty-seven thousand, nine hundred forty-five".