172541836 has 6 divisors (see below), whose sum is σ = 301948220. Its totient is φ = 86270916.

The previous prime is 172541827. The next prime is 172541839. The reversal of 172541836 is 638145271.

It is a junction number, because it is equal to n+sod(n) for n = 172541795 and 172541804.

It is not an unprimeable number, because it can be changed into a prime (172541839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21567726 + ... + 21567733.

Almost surely, 2^172541836 is an apocalyptic number.

It is an amenable number.

172541836 is a deficient number, since it is larger than the sum of its proper divisors (129406384).

172541836 is a wasteful number, since it uses less digits than its factorization.

172541836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43135463 (or 43135461 counting only the distinct ones).

The product of its digits is 40320, while the sum is 37.

The square root of 172541836 is about 13135.5181093096. The cubic root of 172541836 is about 556.7131395737.

The spelling of 172541836 in words is "one hundred seventy-two million, five hundred forty-one thousand, eight hundred thirty-six".