1252346778 has 16 divisors (see below), whose sum is σ = 2782992960. Its totient is φ = 417448908.

The previous prime is 1252346761. The next prime is 1252346779. The reversal of 1252346778 is 8776432521.

1252346778 is a `hidden beast` number, since 12 + 523 + 46 + 7 + 78 = 666.

It is not an unprimeable number, because it can be changed into a prime (1252346779) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11595750 + ... + 11595857.

It is an arithmetic number, because the mean of its divisors is an integer number (173937060).

Almost surely, 2^1252346778 is an apocalyptic number.

1252346778 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1252346778 is an abundant number, since it is smaller than the sum of its proper divisors (1530646182).

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

1252346778 is a wasteful number, since it uses less digits than its factorization.

1252346778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23191618 (or 23191612 counting only the distinct ones).

The product of its digits is 564480, while the sum is 45.

The square root of 1252346778 is about 35388.5119495014. The cubic root of 1252346778 is about 1077.8910542371.

The spelling of 1252346778 in words is "one billion, two hundred fifty-two million, three hundred forty-six thousand, seven hundred seventy-eight".