1125773861 has 2 divisors, whose sum is σ = 1125773862. Its totient is φ = 1125773860.

The previous prime is 1125773843. The next prime is 1125773911. The reversal of 1125773861 is 1683775211.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 871371361 + 254402500 = 29519^2 + 15950^2 .

It is a cyclic number.

It is not a de Polignac number, because 1125773861 - 2⁶ = 1125773797 is a prime.

It is a super-2 number, since 2×1125773861² = 2534733572221694642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1125773261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 562886930 + 562886931.

It is an arithmetic number, because the mean of its divisors is an integer number (562886931).

Almost surely, 2^1125773861 is an apocalyptic number.

It is an amenable number.

1125773861 is a deficient number, since it is larger than the sum of its proper divisors (1).

1125773861 is an equidigital number, since it uses as much as digits as its factorization.

1125773861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70560, while the sum is 41.

The square root of 1125773861 is about 33552.5537180108. The cubic root of 1125773861 is about 1040.2803303108.

The spelling of 1125773861 in words is "one billion, one hundred twenty-five million, seven hundred seventy-three thousand, eight hundred sixty-one".