172121141 has 8 divisors (see below), whose sum is σ = 183409560. Its totient is φ = 160962048.

The previous prime is 172121129. The next prime is 172121153. The reversal of 172121141 is 141121271.

It is an interprime number because it is at equal distance from previous prime (172121129) and next prime (172121153).

It can be written as a sum of positive squares in 4 ways, for example, as 38626225 + 133494916 = 6215^2 + 11554^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 172121141 - 2¹⁸ = 171858997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172121441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29576 + ... + 34913.

It is an arithmetic number, because the mean of its divisors is an integer number (22926195).

Almost surely, 2^172121141 is an apocalyptic number.

It is an amenable number.

172121141 is a deficient number, since it is larger than the sum of its proper divisors (11288419).

172121141 is a wasteful number, since it uses less digits than its factorization.

172121141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64663.

The product of its digits is 112, while the sum is 20.

The square root of 172121141 is about 13119.4946930131. The cubic root of 172121141 is about 556.2603082549.

The spelling of 172121141 in words is "one hundred seventy-two million, one hundred twenty-one thousand, one hundred forty-one".