1247734420 has 24 divisors (see below), whose sum is σ = 2624514984. Its totient is φ = 498279936.

The previous prime is 1247734417. The next prime is 1247734441. The reversal of 1247734420 is 244377421.

It can be written as a sum of positive squares in 4 ways, for example, as 125350416 + 1122384004 = 11196^2 + 33502^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38217 + ... + 62896.

It is an arithmetic number, because the mean of its divisors is an integer number (109354791).

Almost surely, 2^1247734420 is an apocalyptic number.

1247734420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1247734420 is an abundant number, since it is smaller than the sum of its proper divisors (1376780564).

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

1247734420 is a wasteful number, since it uses less digits than its factorization.

1247734420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101739 (or 101737 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 34.

The square root of 1247734420 is about 35323.2843886295. The cubic root of 1247734420 is about 1076.5661455461.

The spelling of 1247734420 in words is "one billion, two hundred forty-seven million, seven hundred thirty-four thousand, four hundred twenty".