105491272 has 8 divisors (see below), whose sum is σ = 197796150. Its totient is φ = 52745632.

The previous prime is 105491231. The next prime is 105491279. The reversal of 105491272 is 272194501.

It can be written as a sum of positive squares in only one way, i.e., 57244356 + 48246916 = 7566^2 + 6946^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×105491272² = 22256816936355968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (105491279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6593197 + ... + 6593212.

Almost surely, 2^105491272 is an apocalyptic number.

It is an amenable number.

105491272 is a deficient number, since it is larger than the sum of its proper divisors (92304878).

105491272 is a wasteful number, since it uses less digits than its factorization.

105491272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13186415 (or 13186411 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 105491272 is about 10270.8944109070. The cubic root of 105491272 is about 472.5040220629.

The spelling of 105491272 in words is "one hundred five million, four hundred ninety-one thousand, two hundred seventy-two".