1165125601 has 2 divisors, whose sum is σ = 1165125602. Its totient is φ = 1165125600.

The previous prime is 1165125529. The next prime is 1165125623. The reversal of 1165125601 is 1065215611.

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., 1090320400 + 74805201 = 33020^2 + 8649^2 .

It is a cyclic number.

It is not a de Polignac number, because 1165125601 - 2⁷ = 1165125473 is a prime.

It is a super-2 number, since 2×1165125601² = 2715035332211222402, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1165125601.

It is not a weakly prime, because it can be changed into another prime (1165125631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 582562800 + 582562801.

It is an arithmetic number, because the mean of its divisors is an integer number (582562801).

Almost surely, 2^1165125601 is an apocalyptic number.

It is an amenable number.

1165125601 is a deficient number, since it is larger than the sum of its proper divisors (1).

1165125601 is an equidigital number, since it uses as much as digits as its factorization.

1165125601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 28.

The square root of 1165125601 is about 34133.9362072410. The cubic root of 1165125601 is about 1052.2628751354.

The spelling of 1165125601 in words is "one billion, one hundred sixty-five million, one hundred twenty-five thousand, six hundred one".