1249147806 has 8 divisors (see below), whose sum is σ = 2498295624. Its totient is φ = 416382600.

The previous prime is 1249147793. The next prime is 1249147817. The reversal of 1249147806 is 6087419421.

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

1249147806 is an admirable number.

It is a super-2 number, since 2×1249147806² = 3120740482469227272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104095645 + ... + 104095656.

It is an arithmetic number, because the mean of its divisors is an integer number (312286953).

Almost surely, 2^1249147806 is an apocalyptic number.

1249147806 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1249147806 is a wasteful number, since it uses less digits than its factorization.

1249147806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208191306.

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 1249147806 is about 35343.2851613995. The cubic root of 1249147806 is about 1076.9724898549.

The spelling of 1249147806 in words is "one billion, two hundred forty-nine million, one hundred forty-seven thousand, eight hundred six".