172140570 has 192 divisors, whose sum is σ = 548570880. Its totient is φ = 36578304.

The previous prime is 172140559. The next prime is 172140571. The reversal of 172140570 is 75041271.

172140570 is nontrivially palindromic in base 4.

It is not an unprimeable number, because it can be changed into a prime (172140571) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 873712 + ... + 873908.

It is an arithmetic number, because the mean of its divisors is an integer number (2857140).

Almost surely, 2^172140570 is an apocalyptic number.

172140570 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 172140570, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274285440).

172140570 is an abundant number, since it is smaller than the sum of its proper divisors (376430310).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

172140570 is a wasteful number, since it uses less digits than its factorization.

172140570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309 (or 306 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 27.

The square root of 172140570 is about 13120.2351350881. The cubic root of 172140570 is about 556.2812376515.

The spelling of 172140570 in words is "one hundred seventy-two million, one hundred forty thousand, five hundred seventy".