1247760479 has 4 divisors (see below), whose sum is σ = 1426011984. Its totient is φ = 1069508976.

The previous prime is 1247760473. The next prime is 1247760499. The reversal of 1247760479 is 9740677421.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9740677421 = 421 ⋅23137001.

It is a cyclic number.

It is not a de Polignac number, because 1247760479 - 2¹² = 1247756383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1247760473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89125742 + ... + 89125755.

It is an arithmetic number, because the mean of its divisors is an integer number (356502996).

Almost surely, 2^1247760479 is an apocalyptic number.

1247760479 is a deficient number, since it is larger than the sum of its proper divisors (178251505).

1247760479 is an equidigital number, since it uses as much as digits as its factorization.

1247760479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178251504.

The product of its (nonzero) digits is 592704, while the sum is 47.

The square root of 1247760479 is about 35323.6532510441. The cubic root of 1247760479 is about 1076.5736402078.

The spelling of 1247760479 in words is "one billion, two hundred forty-seven million, seven hundred sixty thousand, four hundred seventy-nine".