1125901384561 has 8 divisors (see below), whose sum is σ = 1137968248104. Its totient is φ = 1113852547200.

The previous prime is 1125901384523. The next prime is 1125901384589. The reversal of 1125901384561 is 1654831095211.

It can be written as a sum of positive squares in 4 ways, for example, as 205009728400 + 920891656161 = 452780^2 + 959631^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1125901384561 - 2¹⁷ = 1125901253489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1125991384561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4380940 + ... + 4630813.

It is an arithmetic number, because the mean of its divisors is an integer number (142246031013).

Almost surely, 2^{1125901384561} is an apocalyptic number.

It is an amenable number.

1125901384561 is a deficient number, since it is larger than the sum of its proper divisors (12066863543).

1125901384561 is a wasteful number, since it uses less digits than its factorization.

1125901384561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9013091.

The product of its (nonzero) digits is 259200, while the sum is 46.

The spelling of 1125901384561 in words is "one trillion, one hundred twenty-five billion, nine hundred one million, three hundred eighty-four thousand, five hundred sixty-one".