172140569 has 4 divisors (see below), whose sum is σ = 172826640. Its totient is φ = 171454500.

The previous prime is 172140559. The next prime is 172140571. The reversal of 172140569 is 965041271.

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: 965041271 = 47 ⋅20532793.

It is a cyclic number.

It is not a de Polignac number, because 172140569 - 2⁸ = 172140313 is a prime.

It is a super-2 number, since 2×172140569² = 59264750991287522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172140559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 342659 + ... + 343160.

It is an arithmetic number, because the mean of its divisors is an integer number (43206660).

Almost surely, 2^172140569 is an apocalyptic number.

It is an amenable number.

172140569 is a deficient number, since it is larger than the sum of its proper divisors (686071).

172140569 is an equidigital number, since it uses as much as digits as its factorization.

172140569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686070.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 172140569 is about 13120.2350969790. The cubic root of 172140569 is about 556.2812365744.

The spelling of 172140569 in words is "one hundred seventy-two million, one hundred forty thousand, five hundred sixty-nine".