1252878857 has 8 divisors (see below), whose sum is σ = 1295465472. Its totient is φ = 1210428000.

The previous prime is 1252878853. The next prime is 1252878881. The reversal of 1252878857 is 7588782521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1252878857 - 2² = 1252878853 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1252878799 and 1252878808.

It is not an unprimeable number, because it can be changed into a prime (1252878853) 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, 14993 + ... + 52254.

It is an arithmetic number, because the mean of its divisors is an integer number (161933184).

Almost surely, 2^1252878857 is an apocalyptic number.

It is an amenable number.

1252878857 is a deficient number, since it is larger than the sum of its proper divisors (42586615).

1252878857 is an equidigital number, since it uses as much as digits as its factorization.

1252878857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67879.

The product of its digits is 2508800, while the sum is 53.

The square root of 1252878857 is about 35396.0288309296. The cubic root of 1252878857 is about 1078.0436855477.

The spelling of 1252878857 in words is "one billion, two hundred fifty-two million, eight hundred seventy-eight thousand, eight hundred fifty-seven".