1247243146 has 8 divisors (see below), whose sum is σ = 1888349760. Its totient is φ = 617793228.

The previous prime is 1247243143. The next prime is 1247243147. The reversal of 1247243146 is 6413427421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1247243143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2913906 + ... + 2914333.

It is an arithmetic number, because the mean of its divisors is an integer number (236043720).

Almost surely, 2^1247243146 is an apocalyptic number.

1247243146 is a deficient number, since it is larger than the sum of its proper divisors (641106614).

1247243146 is a wasteful number, since it uses less digits than its factorization.

1247243146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5828348.

The product of its digits is 32256, while the sum is 34.

The square root of 1247243146 is about 35316.3297356903. The cubic root of 1247243146 is about 1076.4248338543.

The spelling of 1247243146 in words is "one billion, two hundred forty-seven million, two hundred forty-three thousand, one hundred forty-six".