1278056052 has 144 divisors (see below), whose sum is σ = 4185650560. Its totient is φ = 319313664.

The previous prime is 1278056051. The next prime is 1278056069. The reversal of 1278056052 is 2506508721.

It is a happy number.

1278056052 is a `hidden beast` number, since 12 + 7 + 80 + 560 + 5 + 2 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 1278055998 and 1278056016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1278056051) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 51978 + ... + 72510.

Almost surely, 2^1278056052 is an apocalyptic number.

1278056052 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1278056052, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2092825280).

1278056052 is an abundant number, since it is smaller than the sum of its proper divisors (2907594508).

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

1278056052 is a wasteful number, since it uses less digits than its factorization.

1278056052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20582 (or 20577 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 1278056052 is about 35749.9098180681. The cubic root of 1278056052 is about 1085.2171132834.

The spelling of 1278056052 in words is "one billion, two hundred seventy-eight million, fifty-six thousand, fifty-two".