172261012 has 48 divisors (see below), whose sum is σ = 379427328. Its totient is φ = 66474720.

The previous prime is 172261003. The next prime is 172261027. The reversal of 172261012 is 210162271.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30343 + ... + 35569.

It is an arithmetic number, because the mean of its divisors is an integer number (7904736).

Almost surely, 2^172261012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172261012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (189713664).

172261012 is an abundant number, since it is smaller than the sum of its proper divisors (207166316).

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

172261012 is a wasteful number, since it uses less digits than its factorization.

172261012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5356 (or 5354 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 172261012 is about 13124.8242654902. The cubic root of 172261012 is about 556.4109456086.

The spelling of 172261012 in words is "one hundred seventy-two million, two hundred sixty-one thousand, twelve".