1247497376 has 12 divisors (see below), whose sum is σ = 2456010522. Its totient is φ = 623748672.

The previous prime is 1247497367. The next prime is 1247497403. The reversal of 1247497376 is 6737947421.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 822312976 + 425184400 = 28676^2 + 20620^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19492115 + ... + 19492178.

Almost surely, 2^1247497376 is an apocalyptic number.

1247497376 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1247497376 is a deficient number, since it is larger than the sum of its proper divisors (1208513146).

1247497376 is an equidigital number, since it uses as much as digits as its factorization.

1247497376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38984303 (or 38984295 counting only the distinct ones).

The product of its digits is 1778112, while the sum is 50.

The square root of 1247497376 is about 35319.9288787506. The cubic root of 1247497376 is about 1076.4979660512.

The spelling of 1247497376 in words is "one billion, two hundred forty-seven million, four hundred ninety-seven thousand, three hundred seventy-six".