13146445 has 16 divisors (see below), whose sum is σ = 17407152. Its totient is φ = 9469440.

The previous prime is 13146437. The next prime is 13146451. The reversal of 13146445 is 54464131.

It can be written as a sum of positive squares in 8 ways, for example, as 4748041 + 8398404 = 2179^2 + 2898^2 .

It is not a de Polignac number, because 13146445 - 2³ = 13146437 is a prime.

It is a super-2 number, since 2×13146445² = 345658032276050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 199 + ... + 5131.

It is an arithmetic number, because the mean of its divisors is an integer number (1087947).

Almost surely, 2^13146445 is an apocalyptic number.

It is an amenable number.

13146445 is a deficient number, since it is larger than the sum of its proper divisors (4260707).

13146445 is a wasteful number, since it uses less digits than its factorization.

13146445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4992.

The product of its digits is 5760, while the sum is 28.

The square root of 13146445 is about 3625.8026697547. The cubic root of 13146445 is about 236.0131001538.

The spelling of 13146445 in words is "thirteen million, one hundred forty-six thousand, four hundred forty-five".