172580542 has 4 divisors (see below), whose sum is σ = 258870816. Its totient is φ = 86290270.

The previous prime is 172580539. The next prime is 172580563. The reversal of 172580542 is 245085271.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 245085271 = 15139 ⋅16189.

It is a junction number, because it is equal to n+sod(n) for n = 172580498 and 172580507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43145134 + ... + 43145137.

It is an arithmetic number, because the mean of its divisors is an integer number (64717704).

Almost surely, 2^172580542 is an apocalyptic number.

172580542 is a deficient number, since it is larger than the sum of its proper divisors (86290274).

172580542 is an equidigital number, since it uses as much as digits as its factorization.

172580542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86290273.

The product of its (nonzero) digits is 22400, while the sum is 34.

The square root of 172580542 is about 13136.9913602773. The cubic root of 172580542 is about 556.7547652807.

The spelling of 172580542 in words is "one hundred seventy-two million, five hundred eighty thousand, five hundred forty-two".