142265309 has 4 divisors (see below), whose sum is σ = 142396800. Its totient is φ = 142133820.

The previous prime is 142265257. The next prime is 142265317. The reversal of 142265309 is 903562241.

It is a happy number.

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: 903562241 = 3911 ⋅231031.

It is a cyclic number.

It is not a de Polignac number, because 142265309 - 2¹⁶ = 142199773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142265209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64109 + ... + 66290.

It is an arithmetic number, because the mean of its divisors is an integer number (35599200).

Almost surely, 2^142265309 is an apocalyptic number.

It is an amenable number.

142265309 is a deficient number, since it is larger than the sum of its proper divisors (131491).

142265309 is a wasteful number, since it uses less digits than its factorization.

142265309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131490.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 142265309 is about 11927.5022112763. The cubic root of 142265309 is about 522.0350590311.

The spelling of 142265309 in words is "one hundred forty-two million, two hundred sixty-five thousand, three hundred nine".