1125726646 has 24 divisors (see below), whose sum is σ = 1876943880. Its totient is φ = 505934880.

The previous prime is 1125726631. The next prime is 1125726647. The reversal of 1125726646 is 6466275211.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1125726599 and 1125726608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125726647) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4596 + ... + 47671.

It is an arithmetic number, because the mean of its divisors is an integer number (78205995).

Almost surely, 2^1125726646 is an apocalyptic number.

1125726646 is a deficient number, since it is larger than the sum of its proper divisors (751217234).

1125726646 is a wasteful number, since it uses less digits than its factorization.

1125726646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52380 (or 52369 counting only the distinct ones).

The product of its digits is 120960, while the sum is 40.

The square root of 1125726646 is about 33551.8501129222. The cubic root of 1125726646 is about 1040.2657869748.

The spelling of 1125726646 in words is "one billion, one hundred twenty-five million, seven hundred twenty-six thousand, six hundred forty-six".