1525714661 has 2 divisors, whose sum is σ = 1525714662. Its totient is φ = 1525714660.

The previous prime is 1525714651. The next prime is 1525714699. The reversal of 1525714661 is 1664175251.

It is an a-pointer prime, because the next prime (1525714699) can be obtained adding 1525714661 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1479556225 + 46158436 = 38465^2 + 6794^2 .

It is a cyclic number.

It is not a de Polignac number, because 1525714661 - 2¹⁴ = 1525698277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1525714651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 762857330 + 762857331.

It is an arithmetic number, because the mean of its divisors is an integer number (762857331).

Almost surely, 2^1525714661 is an apocalyptic number.

It is an amenable number.

1525714661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1525714661 is an equidigital number, since it uses as much as digits as its factorization.

1525714661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50400, while the sum is 38.

The square root of 1525714661 is about 39060.3976042231. The cubic root of 1525714661 is about 1151.2185347292.

The spelling of 1525714661 in words is "one billion, five hundred twenty-five million, seven hundred fourteen thousand, six hundred sixty-one".