12091955 has 8 divisors (see below), whose sum is σ = 14621904. Its totient is φ = 9599200.

The previous prime is 12091949. The next prime is 12091957. The reversal of 12091955 is 55919021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12091955 - 2⁸ = 12091699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12091957) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8576 + ... + 9885.

It is an arithmetic number, because the mean of its divisors is an integer number (1827738).

Almost surely, 2^12091955 is an apocalyptic number.

12091955 is a deficient number, since it is larger than the sum of its proper divisors (2529949).

12091955 is a wasteful number, since it uses less digits than its factorization.

12091955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18597.

The product of its (nonzero) digits is 4050, while the sum is 32.

The square root of 12091955 is about 3477.3488464634. The cubic root of 12091955 is about 229.5261510950.

The spelling of 12091955 in words is "twelve million, ninety-one thousand, nine hundred fifty-five".