11851272 has 40 divisors (see below), whose sum is σ = 33196350. Its totient is φ = 3950208.

The previous prime is 11851219. The next prime is 11851291. The reversal of 11851272 is 27215811.

It can be written as a sum of positive squares in only one way, i.e., 6625476 + 5225796 = 2574^2 + 2286^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 8497 + ... + 9792.

Almost surely, 2^11851272 is an apocalyptic number.

11851272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11851272 is an abundant number, since it is smaller than the sum of its proper divisors (21345078).

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

11851272 is a wasteful number, since it uses less digits than its factorization.

11851272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18307 (or 18294 counting only the distinct ones).

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

The square root of 11851272 is about 3442.5676463942. The cubic root of 11851272 is about 227.9930745819.

The spelling of 11851272 in words is "eleven million, eight hundred fifty-one thousand, two hundred seventy-two".