172142437 has 2 divisors, whose sum is σ = 172142438. Its totient is φ = 172142436.

The previous prime is 172142429. The next prime is 172142441. The reversal of 172142437 is 734241271.

172142437 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135163876 + 36978561 = 11626^2 + 6081^2 .

It is a cyclic number.

It is not a de Polignac number, because 172142437 - 2³ = 172142429 is a prime.

It is equal to p_9616216 and since 172142437 and 9616216 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 172142399 and 172142408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172142407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86071218 + 86071219.

It is an arithmetic number, because the mean of its divisors is an integer number (86071219).

Almost surely, 2^172142437 is an apocalyptic number.

It is an amenable number.

172142437 is a deficient number, since it is larger than the sum of its proper divisors (1).

172142437 is an equidigital number, since it uses as much as digits as its factorization.

172142437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9408, while the sum is 31.

The square root of 172142437 is about 13120.3062845347. The cubic root of 172142437 is about 556.2832487469.

The spelling of 172142437 in words is "one hundred seventy-two million, one hundred forty-two thousand, four hundred thirty-seven".