145742569 has 4 divisors (see below), whose sum is σ = 166562944. Its totient is φ = 124922196.

The previous prime is 145742561. The next prime is 145742579. The reversal of 145742569 is 965247541.

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.

It is not a de Polignac number, because 145742569 - 2³ = 145742561 is a prime.

It is a super-2 number, since 2×145742569² = 42481792837439522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145742561) 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, 10410177 + ... + 10410190.

It is an arithmetic number, because the mean of its divisors is an integer number (41640736).

Almost surely, 2^145742569 is an apocalyptic number.

It is an amenable number.

145742569 is a deficient number, since it is larger than the sum of its proper divisors (20820375).

145742569 is an equidigital number, since it uses as much as digits as its factorization.

145742569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20820374.

The product of its digits is 302400, while the sum is 43.

The square root of 145742569 is about 12072.3887031523. The cubic root of 145742569 is about 526.2540771101.

The spelling of 145742569 in words is "one hundred forty-five million, seven hundred forty-two thousand, five hundred sixty-nine".