1242884279 has 16 divisors (see below), whose sum is σ = 1571051328. Its totient is φ = 956800512.

The previous prime is 1242884273. The next prime is 1242884299. The reversal of 1242884279 is 9724882421.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1242884279 is a prime.

It is a super-2 number, since 2×1242884279² = 3089522661970699682, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242884273) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 181202 + ... + 187935.

It is an arithmetic number, because the mean of its divisors is an integer number (98190708).

Almost surely, 2^1242884279 is an apocalyptic number.

1242884279 is a deficient number, since it is larger than the sum of its proper divisors (328167049).

1242884279 is a wasteful number, since it uses less digits than its factorization.

1242884279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369194.

The product of its digits is 516096, while the sum is 47.

The square root of 1242884279 is about 35254.5639456794. The cubic root of 1242884279 is about 1075.1694065815.

The spelling of 1242884279 in words is "one billion, two hundred forty-two million, eight hundred eighty-four thousand, two hundred seventy-nine".