172420142 has 4 divisors (see below), whose sum is σ = 258630216. Its totient is φ = 86210070.

The previous prime is 172420141. The next prime is 172420151. The reversal of 172420142 is 241024271.

172420142 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172420141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43105034 + ... + 43105037.

It is an arithmetic number, because the mean of its divisors is an integer number (64657554).

Almost surely, 2^172420142 is an apocalyptic number.

172420142 is a deficient number, since it is larger than the sum of its proper divisors (86210074).

172420142 is an equidigital number, since it uses as much as digits as its factorization.

172420142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86210073.

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 172420142 is about 13130.8850425247. The cubic root of 172420142 is about 556.5822252704.

The spelling of 172420142 in words is "one hundred seventy-two million, four hundred twenty thousand, one hundred forty-two".