13776001 has 4 divisors (see below), whose sum is σ = 14586372. Its totient is φ = 12965632.

The previous prime is 13775999. The next prime is 13776017. The reversal of 13776001 is 10067731.

13776001 = 2624² + 2625².

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6890625 + 6885376 = 2625^2 + 2624^2 .

It is a cyclic number.

It is not a de Polignac number, because 13776001 - 2¹ = 13775999 is a prime.

It is a super-4 number, since 4×13776001⁴ (a number of 30 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13776031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 405160 + ... + 405193.

It is an arithmetic number, because the mean of its divisors is an integer number (3646593).

Almost surely, 2^13776001 is an apocalyptic number.

13776001 is the 2625-th centered square number.

It is an amenable number.

13776001 is a deficient number, since it is larger than the sum of its proper divisors (810371).

13776001 is an equidigital number, since it uses as much as digits as its factorization.

13776001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810370.

The product of its (nonzero) digits is 882, while the sum is 25.

The square root of 13776001 is about 3711.6035618045. The cubic root of 13776001 is about 239.7219058990.

The spelling of 13776001 in words is "thirteen million, seven hundred seventy-six thousand, one".