172428037 has 4 divisors (see below), whose sum is σ = 172540620. Its totient is φ = 172315456.

The previous prime is 172428019. The next prime is 172428049. The reversal of 172428037 is 730824271.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14699556 + 157728481 = 3834^2 + 12559^2 .

It is a cyclic number.

It is not a de Polignac number, because 172428037 - 2⁷ = 172427909 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 172427993 and 172428011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172428017) 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, 53962 + ... + 57067.

It is an arithmetic number, because the mean of its divisors is an integer number (43135155).

Almost surely, 2^172428037 is an apocalyptic number.

It is an amenable number.

172428037 is a deficient number, since it is larger than the sum of its proper divisors (112583).

172428037 is a wasteful number, since it uses less digits than its factorization.

172428037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112582.

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 172428037 is about 13131.1856661918. The cubic root of 172428037 is about 556.5907203134.

The spelling of 172428037 in words is "one hundred seventy-two million, four hundred twenty-eight thousand, thirty-seven".