13771145 has 8 divisors (see below), whose sum is σ = 16553160. Its totient is φ = 10998400.

The previous prime is 13771127. The next prime is 13771151. The reversal of 13771145 is 54117731.

It can be written as a sum of positive squares in 4 ways, for example, as 1401856 + 12369289 = 1184^2 + 3517^2 .

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

It is not a de Polignac number, because 13771145 - 2⁶ = 13771081 is a prime.

It is a super-2 number, since 2×13771145² = 379288869222050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1541 + ... + 5469.

It is an arithmetic number, because the mean of its divisors is an integer number (2069145).

Almost surely, 2^13771145 is an apocalyptic number.

It is an amenable number.

13771145 is a deficient number, since it is larger than the sum of its proper divisors (2782015).

13771145 is an equidigital number, since it uses as much as digits as its factorization.

13771145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4635.

The product of its digits is 2940, while the sum is 29.

The square root of 13771145 is about 3710.9493394548. The cubic root of 13771145 is about 239.6937354989.

Adding to 13771145 its reverse (54117731), we get a palindrome (67888876).

The spelling of 13771145 in words is "thirteen million, seven hundred seventy-one thousand, one hundred forty-five".