152173121 has 4 divisors (see below), whose sum is σ = 157420500. Its totient is φ = 146925744.

The previous prime is 152173081. The next prime is 152173139. The reversal of 152173121 is 121371251.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 128504896 + 23668225 = 11336^2 + 4865^2 .

It is a cyclic number.

It is not a de Polignac number, because 152173121 - 2⁶ = 152173057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (152173321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2623646 + ... + 2623703.

It is an arithmetic number, because the mean of its divisors is an integer number (39355125).

Almost surely, 2^152173121 is an apocalyptic number.

It is an amenable number.

152173121 is a deficient number, since it is larger than the sum of its proper divisors (5247379).

152173121 is an equidigital number, since it uses as much as digits as its factorization.

152173121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5247378.

The product of its digits is 420, while the sum is 23.

The square root of 152173121 is about 12335.8469915932. The cubic root of 152173121 is about 533.8828653103.

The spelling of 152173121 in words is "one hundred fifty-two million, one hundred seventy-three thousand, one hundred twenty-one".