1242749989426 has 16 divisors (see below), whose sum is σ = 2035261922400. Its totient is φ = 564422183680.

The previous prime is 1242749989423. The next prime is 1242749989433. The reversal of 1242749989426 is 6249899472421.

It is a super-2 number, since 2×1242749989426² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1242749989423) 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, 23181376 + ... + 23234923.

It is an arithmetic number, because the mean of its divisors is an integer number (127203870150).

Almost surely, 2^{1242749989426} is an apocalyptic number.

1242749989426 is a deficient number, since it is larger than the sum of its proper divisors (792511932974).

1242749989426 is a wasteful number, since it uses less digits than its factorization.

1242749989426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46417529.

The product of its digits is 125411328, while the sum is 67.

The spelling of 1242749989426 in words is "one trillion, two hundred forty-two billion, seven hundred forty-nine million, nine hundred eighty-nine thousand, four hundred twenty-six".