172087542 has 48 divisors (see below), whose sum is σ = 413674560. Its totient is φ = 51260400.

The previous prime is 172087523. The next prime is 172087607. The reversal of 172087542 is 245780271.

172087542 is a `hidden beast` number, since 17 + 20 + 87 + 542 = 666.

172087542 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×172087542² = 59228244223203528, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 172087497 and 172087506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4317 + ... + 19047.

It is an arithmetic number, because the mean of its divisors is an integer number (8618220).

Almost surely, 2^172087542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172087542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (206837280).

172087542 is an abundant number, since it is smaller than the sum of its proper divisors (241587018).

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

172087542 is a wasteful number, since it uses less digits than its factorization.

172087542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14809 (or 14806 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 36.

The square root of 172087542 is about 13118.2141315043. The cubic root of 172087542 is about 556.2241108685.

The spelling of 172087542 in words is "one hundred seventy-two million, eighty-seven thousand, five hundred forty-two".