152123921 has 2 divisors, whose sum is σ = 152123922. Its totient is φ = 152123920.

The previous prime is 152123891. The next prime is 152123927. The reversal of 152123921 is 129321251.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83978896 + 68145025 = 9164^2 + 8255^2 .

It is an emirp because it is prime and its reverse (129321251) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-152123921 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (152123927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76061960 + 76061961.

It is an arithmetic number, because the mean of its divisors is an integer number (76061961).

Almost surely, 2^152123921 is an apocalyptic number.

It is an amenable number.

152123921 is a deficient number, since it is larger than the sum of its proper divisors (1).

152123921 is an equidigital number, since it uses as much as digits as its factorization.

152123921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1080, while the sum is 26.

The square root of 152123921 is about 12333.8526422201. The cubic root of 152123921 is about 533.8253214897.

The spelling of 152123921 in words is "one hundred fifty-two million, one hundred twenty-three thousand, nine hundred twenty-one".