1258724681042 has 8 divisors (see below), whose sum is σ = 1897671220236. Its totient is φ = 626167607632.

The previous prime is 1258724681029. The next prime is 1258724681077. The reversal of 1258724681042 is 2401864278521.

It is a Cunningham number, because it is equal to 1121929²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 1258724681041 + 1 = 1121929^2 + 1^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1597365953 + ... + 1597366740.

Almost surely, 2^{1258724681042} is an apocalyptic number.

1258724681042 is a deficient number, since it is larger than the sum of its proper divisors (638946539194).

1258724681042 is a wasteful number, since it uses less digits than its factorization.

1258724681042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3194732892.

The product of its (nonzero) digits is 1720320, while the sum is 50.

The spelling of 1258724681042 in words is "one trillion, two hundred fifty-eight billion, seven hundred twenty-four million, six hundred eighty-one thousand, forty-two".