26142181 has 8 divisors (see below), whose sum is σ = 28195160. Its totient is φ = 24095232.

The previous prime is 26142163. The next prime is 26142241. The reversal of 26142181 is 18124162.

It can be written as a sum of positive squares in 4 ways, for example, as 1232100 + 24910081 = 1110^2 + 4991^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 26142181 - 2²¹ = 24045029 is a prime.

It is a super-2 number, since 2×26142181² = 1366827254873522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26142161) 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, 12121 + ... + 14113.

It is an arithmetic number, because the mean of its divisors is an integer number (3524395).

Almost surely, 2^26142181 is an apocalyptic number.

It is an amenable number.

26142181 is a deficient number, since it is larger than the sum of its proper divisors (2052979).

26142181 is a wasteful number, since it uses less digits than its factorization.

26142181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3015.

The product of its digits is 768, while the sum is 25.

The square root of 26142181 is about 5112.9424991877. The cubic root of 26142181 is about 296.7886391238.

The spelling of 26142181 in words is "twenty-six million, one hundred forty-two thousand, one hundred eighty-one".