1125064661 has 16 divisors (see below), whose sum is σ = 1332913536. Its totient is φ = 929486016.

The previous prime is 1125064649. The next prime is 1125064673. The reversal of 1125064661 is 1664605211.

It is an interprime number because it is at equal distance from previous prime (1125064649) and next prime (1125064673).

It is a cyclic number.

It is not a de Polignac number, because 1125064661 - 2¹⁴ = 1125048277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125064691) 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 in 15 ways as a sum of consecutive naturals, for example, 7415 + ... + 48011.

It is an arithmetic number, because the mean of its divisors is an integer number (83307096).

Almost surely, 2^1125064661 is an apocalyptic number.

It is an amenable number.

1125064661 is a deficient number, since it is larger than the sum of its proper divisors (207848875).

1125064661 is a wasteful number, since it uses less digits than its factorization.

1125064661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40748.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 1125064661 is about 33541.9835579233. The cubic root of 1125064661 is about 1040.0618371146.

Adding to 1125064661 its reverse (1664605211), we get a palindrome (2789669872).

The spelling of 1125064661 in words is "one billion, one hundred twenty-five million, sixty-four thousand, six hundred sixty-one".