1247458740 has 48 divisors (see below), whose sum is σ = 3810421440. Its totient is φ = 302414080.

The previous prime is 1247458687. The next prime is 1247458753. The reversal of 1247458740 is 478547421.

It is a junction number, because it is equal to n+sod(n) for n = 1247458692 and 1247458701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 944385 + ... + 945704.

It is an arithmetic number, because the mean of its divisors is an integer number (79383780).

Almost surely, 2^1247458740 is an apocalyptic number.

1247458740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1247458740 is an abundant number, since it is smaller than the sum of its proper divisors (2562962700).

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

1247458740 is a wasteful number, since it uses less digits than its factorization.

1247458740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1890112 (or 1890110 counting only the distinct ones).

The product of its (nonzero) digits is 250880, while the sum is 42.

The square root of 1247458740 is about 35319.3819311720. The cubic root of 1247458740 is about 1076.4868525997.

The spelling of 1247458740 in words is "one billion, two hundred forty-seven million, four hundred fifty-eight thousand, seven hundred forty".