1125779405 has 8 divisors (see below), whose sum is σ = 1353531384. Its totient is φ = 898892800.

The previous prime is 1125779383. The next prime is 1125779419. The reversal of 1125779405 is 5049775211.

It can be written as a sum of positive squares in 4 ways, for example, as 276989449 + 848789956 = 16643^2 + 29134^2 .

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

It is not a de Polignac number, because 1125779405 - 2⁶ = 1125779341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213476 + ... + 218685.

It is an arithmetic number, because the mean of its divisors is an integer number (169191423).

Almost surely, 2^1125779405 is an apocalyptic number.

It is an amenable number.

1125779405 is a deficient number, since it is larger than the sum of its proper divisors (227751979).

1125779405 is an equidigital number, since it uses as much as digits as its factorization.

1125779405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432687.

The product of its (nonzero) digits is 88200, while the sum is 41.

The square root of 1125779405 is about 33552.6363345714. The cubic root of 1125779405 is about 1040.2820379672.

The spelling of 1125779405 in words is "one billion, one hundred twenty-five million, seven hundred seventy-nine thousand, four hundred five".