1242449761 has 16 divisors (see below), whose sum is σ = 1433232000. Its totient is φ = 1055029248.

The previous prime is 1242449759. The next prime is 1242449807. The reversal of 1242449761 is 1679442421.

It is not a de Polignac number, because 1242449761 - 2¹ = 1242449759 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1242449711) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 460705 + ... + 463393.

It is an arithmetic number, because the mean of its divisors is an integer number (89577000).

Almost surely, 2^1242449761 is an apocalyptic number.

It is an amenable number.

1242449761 is a deficient number, since it is larger than the sum of its proper divisors (190782239).

1242449761 is a wasteful number, since it uses less digits than its factorization.

1242449761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3288.

The product of its digits is 96768, while the sum is 40.

The square root of 1242449761 is about 35248.4008289738. The cubic root of 1242449761 is about 1075.0440972717.

The spelling of 1242449761 in words is "one billion, two hundred forty-two million, four hundred forty-nine thousand, seven hundred sixty-one".