152660521 has 4 divisors (see below), whose sum is σ = 164403652. Its totient is φ = 140917392.

The previous prime is 152660509. The next prime is 152660539. The reversal of 152660521 is 125066251.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 125066251 = 3719 ⋅33629.

It can be written as a sum of positive squares in 2 ways, for example, as 17264025 + 135396496 = 4155^2 + 11636^2 .

It is a cyclic number.

It is not a de Polignac number, because 152660521 - 2¹³ = 152652329 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 152660521.

It is not an unprimeable number, because it can be changed into a prime (152660551) 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, 5871546 + ... + 5871571.

It is an arithmetic number, because the mean of its divisors is an integer number (41100913).

Almost surely, 2^152660521 is an apocalyptic number.

It is an amenable number.

152660521 is a deficient number, since it is larger than the sum of its proper divisors (11743131).

152660521 is a wasteful number, since it uses less digits than its factorization.

152660521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11743130.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 152660521 is about 12355.5866311560. The cubic root of 152660521 is about 534.4522544897.

It can be divided in two parts, 152660 and 521, that added together give a triangular number (153181 = T₅₅₃).

The spelling of 152660521 in words is "one hundred fifty-two million, six hundred sixty thousand, five hundred twenty-one".