1242837649815 has 32 divisors (see below), whose sum is σ = 2093511744000. Its totient is φ = 627866628480.

The previous prime is 1242837649813. The next prime is 1242837649841. The reversal of 1242837649815 is 5189467382421.

It is not a de Polignac number, because 1242837649815 - 2¹ = 1242837649813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242837649813) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1614361 + ... + 2256509.

It is an arithmetic number, because the mean of its divisors is an integer number (65422242000).

Almost surely, 2^{1242837649815} is an apocalyptic number.

1242837649815 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1242837649815 is a deficient number, since it is larger than the sum of its proper divisors (850674094185).

1242837649815 is a wasteful number, since it uses less digits than its factorization.

1242837649815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648967.

The product of its digits is 23224320, while the sum is 60.

The spelling of 1242837649815 in words is "one trillion, two hundred forty-two billion, eight hundred thirty-seven million, six hundred forty-nine thousand, eight hundred fifteen".