1242878112 has 72 divisors (see below), whose sum is σ = 4039360416. Its totient is φ = 355107456.

The previous prime is 1242878107. The next prime is 1242878113. The reversal of 1242878112 is 2118782421.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1242878113) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 306238 + ... + 310269.

It is an arithmetic number, because the mean of its divisors is an integer number (56102228).

Almost surely, 2^1242878112 is an apocalyptic number.

1242878112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1242878112 is an abundant number, since it is smaller than the sum of its proper divisors (2796482304).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1242878112 is a wasteful number, since it uses less digits than its factorization.

1242878112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616530 (or 616519 counting only the distinct ones).

The product of its digits is 14336, while the sum is 36.

The square root of 1242878112 is about 35254.4764817179. The cubic root of 1242878112 is about 1075.1676283036.

The spelling of 1242878112 in words is "one billion, two hundred forty-two million, eight hundred seventy-eight thousand, one hundred twelve".