1125785810242 has 4 divisors (see below), whose sum is σ = 1688678715366. Its totient is φ = 562892905120.

The previous prime is 1125785810221. The next prime is 1125785810267. The reversal of 1125785810242 is 2420185875211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 677179222281 + 448606587961 = 822909^2 + 669781^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1125785810192 and 1125785810201.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 281446452559 + ... + 281446452562.

Almost surely, 2^{1125785810242} is an apocalyptic number.

1125785810242 is a deficient number, since it is larger than the sum of its proper divisors (562892905124).

1125785810242 is an equidigital number, since it uses as much as digits as its factorization.

1125785810242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562892905123.

The product of its (nonzero) digits is 358400, while the sum is 46.

The spelling of 1125785810242 in words is "one trillion, one hundred twenty-five billion, seven hundred eighty-five million, eight hundred ten thousand, two hundred forty-two".