12861954 has 24 divisors (see below), whose sum is σ = 31848960. Its totient is φ = 3674808.

The previous prime is 12861949. The next prime is 12861983. The reversal of 12861954 is 45916821.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50914 + ... + 51165.

It is an arithmetic number, because the mean of its divisors is an integer number (1327040).

Almost surely, 2^12861954 is an apocalyptic number.

12861954 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

12861954 is an abundant number, since it is smaller than the sum of its proper divisors (18987006).

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

12861954 is a wasteful number, since it uses less digits than its factorization.

12861954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102094 (or 102091 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 12861954 is about 3586.3566470723. The cubic root of 12861954 is about 234.2982171949.

It can be divided in two parts, 1286 and 1954, that added together give a triangular number (3240 = T₈₀).

The spelling of 12861954 in words is "twelve million, eight hundred sixty-one thousand, nine hundred fifty-four".