1247603420 has 24 divisors (see below), whose sum is σ = 2994248544. Its totient is φ = 427749696.

The previous prime is 1247603387. The next prime is 1247603431. The reversal of 1247603420 is 243067421.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 4455587 + ... + 4455866.

It is an arithmetic number, because the mean of its divisors is an integer number (124760356).

Almost surely, 2^1247603420 is an apocalyptic number.

1247603420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1247603420 is an abundant number, since it is smaller than the sum of its proper divisors (1746645124).

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

1247603420 is a wasteful number, since it uses less digits than its factorization.

1247603420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8911469 (or 8911467 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 1247603420 is about 35321.4300390004. The cubic root of 1247603420 is about 1076.5284678965.

The spelling of 1247603420 in words is "one billion, two hundred forty-seven million, six hundred three thousand, four hundred twenty".