145126669 has 4 divisors (see below), whose sum is σ = 145371996. Its totient is φ = 144881344.

The previous prime is 145126661. The next prime is 145126673. The reversal of 145126669 is 966621541.

It is a happy number.

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 81685444 + 63441225 = 9038^2 + 7965^2 .

It is a cyclic number.

It is not a de Polignac number, because 145126669 - 2³ = 145126661 is a prime.

It is a super-2 number, since 2×145126669² = 42123500110071122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145126661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121774 + ... + 122959.

It is an arithmetic number, because the mean of its divisors is an integer number (36342999).

Almost surely, 2^145126669 is an apocalyptic number.

It is an amenable number.

145126669 is a deficient number, since it is larger than the sum of its proper divisors (245327).

145126669 is an equidigital number, since it uses as much as digits as its factorization.

145126669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245326.

The product of its digits is 77760, while the sum is 40.

The square root of 145126669 is about 12046.8530745585. The cubic root of 145126669 is about 525.5117235796.

The spelling of 145126669 in words is "one hundred forty-five million, one hundred twenty-six thousand, six hundred sixty-nine".