145280069 has 4 divisors (see below), whose sum is σ = 158487360. Its totient is φ = 132072780.

The previous prime is 145280039. The next prime is 145280071. The reversal of 145280069 is 960082541.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 960082541 = 11 ⋅87280231.

It is a cyclic number.

It is not a de Polignac number, because 145280069 - 2¹⁶ = 145214533 is a prime.

It is a super-2 number, since 2×145280069² = 42212596897289522, 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 (145280039) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 6603629 + ... + 6603650.

It is an arithmetic number, because the mean of its divisors is an integer number (39621840).

Almost surely, 2^145280069 is an apocalyptic number.

It is an amenable number.

145280069 is a deficient number, since it is larger than the sum of its proper divisors (13207291).

145280069 is a wasteful number, since it uses less digits than its factorization.

145280069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13207290.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 145280069 is about 12053.2182009619. The cubic root of 145280069 is about 525.6968150187.

The spelling of 145280069 in words is "one hundred forty-five million, two hundred eighty thousand, sixty-nine".