1245206042 has 8 divisors (see below), whose sum is σ = 1872817716. Its totient is φ = 620933472.

The previous prime is 1245205999. The next prime is 1245206051. The reversal of 1245206042 is 2406025421.

It can be written as a sum of positive squares in 2 ways, for example, as 1222271521 + 22934521 = 34961^2 + 4789^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 833843 + ... + 835334.

Almost surely, 2^1245206042 is an apocalyptic number.

1245206042 is a deficient number, since it is larger than the sum of its proper divisors (627611674).

1245206042 is a wasteful number, since it uses less digits than its factorization.

1245206042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1669552.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 1245206042 is about 35287.4771271623. The cubic root of 1245206042 is about 1075.8384781938.

The spelling of 1245206042 in words is "one billion, two hundred forty-five million, two hundred six thousand, forty-two".