1252178478 has 12 divisors (see below), whose sum is σ = 2713053408. Its totient is φ = 417392820.

The previous prime is 1252178429. The next prime is 1252178483. The reversal of 1252178478 is 8748712521.

1252178478 is a `hidden beast` number, since 1 + 2 + 5 + 2 + 178 + 478 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34782718 + ... + 34782753.

It is an arithmetic number, because the mean of its divisors is an integer number (226087784).

Almost surely, 2^1252178478 is an apocalyptic number.

1252178478 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1252178478 is an abundant number, since it is smaller than the sum of its proper divisors (1460874930).

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

1252178478 is a wasteful number, since it uses less digits than its factorization.

1252178478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69565479 (or 69565476 counting only the distinct ones).

The product of its digits is 250880, while the sum is 45.

The square root of 1252178478 is about 35386.1339792863. The cubic root of 1252178478 is about 1077.8427669750.

The spelling of 1252178478 in words is "one billion, two hundred fifty-two million, one hundred seventy-eight thousand, four hundred seventy-eight".