1565252141 has 2 divisors, whose sum is σ = 1565252142. Its totient is φ = 1565252140.

The previous prime is 1565252113. The next prime is 1565252147. The reversal of 1565252141 is 1412525651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1488339241 + 76912900 = 38579^2 + 8770^2 .

It is a cyclic number.

It is not a de Polignac number, because 1565252141 - 2⁶ = 1565252077 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1565252098 and 1565252107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1565252147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 782626070 + 782626071.

It is an arithmetic number, because the mean of its divisors is an integer number (782626071).

Almost surely, 2^1565252141 is an apocalyptic number.

It is an amenable number.

1565252141 is a deficient number, since it is larger than the sum of its proper divisors (1).

1565252141 is an equidigital number, since it uses as much as digits as its factorization.

1565252141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12000, while the sum is 32.

The square root of 1565252141 is about 39563.2675723328. The cubic root of 1565252141 is about 1161.0781051589.

Adding to 1565252141 its reverse (1412525651), we get a palindrome (2977777792).

The spelling of 1565252141 in words is "one billion, five hundred sixty-five million, two hundred fifty-two thousand, one hundred forty-one".