1242045455 has 16 divisors (see below), whose sum is σ = 1704460800. Its totient is φ = 851146272.

The previous prime is 1242045451. The next prime is 1242045487. The reversal of 1242045455 is 5545402421.

It is a cyclic number.

It is not a de Polignac number, because 1242045455 - 2² = 1242045451 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242045451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49022 + ... + 69908.

It is an arithmetic number, because the mean of its divisors is an integer number (106528800).

Almost surely, 2^1242045455 is an apocalyptic number.

1242045455 is a deficient number, since it is larger than the sum of its proper divisors (462415345).

1242045455 is a wasteful number, since it uses less digits than its factorization.

1242045455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22598.

The product of its (nonzero) digits is 32000, while the sum is 32.

The square root of 1242045455 is about 35242.6652652719. The cubic root of 1242045455 is about 1074.9274744653.

Adding to 1242045455 its reverse (5545402421), we get a palindrome (6787447876).

It can be divided in two parts, 12420 and 45455, that added together give a palindrome (57875).

The spelling of 1242045455 in words is "one billion, two hundred forty-two million, forty-five thousand, four hundred fifty-five".