11821275 has 48 divisors (see below), whose sum is σ = 22081920. Its totient is φ = 6199200.

The previous prime is 11821267. The next prime is 11821283. The reversal of 11821275 is 57212811.

11821275 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (11821267) and next prime (11821283).

It is not a de Polignac number, because 11821275 - 2³ = 11821267 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 an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 55920 + ... + 56130.

It is an arithmetic number, because the mean of its divisors is an integer number (460040).

Almost surely, 2^11821275 is an apocalyptic number.

11821275 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11821275 is a deficient number, since it is larger than the sum of its proper divisors (10260645).

11821275 is a wasteful number, since it uses less digits than its factorization.

11821275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313 (or 302 counting only the distinct ones).

The product of its digits is 1120, while the sum is 27.

The square root of 11821275 is about 3438.2081088846. The cubic root of 11821275 is about 227.8005527274.

The spelling of 11821275 in words is "eleven million, eight hundred twenty-one thousand, two hundred seventy-five".