1242561026 has 8 divisors (see below), whose sum is σ = 2130104640. Its totient is φ = 532526148.

The previous prime is 1242561017. The next prime is 1242561053. The reversal of 1242561026 is 6201652421.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1242561026.

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, 44377166 + ... + 44377193.

It is an arithmetic number, because the mean of its divisors is an integer number (266263080).

Almost surely, 2^1242561026 is an apocalyptic number.

1242561026 is a deficient number, since it is larger than the sum of its proper divisors (887543614).

1242561026 is an equidigital number, since it uses as much as digits as its factorization.

1242561026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88754368.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 1242561026 is about 35249.9790921924. The cubic root of 1242561026 is about 1075.0761874253.

The spelling of 1242561026 in words is "one billion, two hundred forty-two million, five hundred sixty-one thousand, twenty-six".