1247587898 has 8 divisors (see below), whose sum is σ = 1881078708. Its totient is φ = 620561664.

The previous prime is 1247587889. The next prime is 1247587903. The reversal of 1247587898 is 8987857421.

It can be written as a sum of positive squares in 2 ways, for example, as 1243479169 + 4108729 = 35263^2 + 2027^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1615661 + ... + 1616432.

Almost surely, 2^1247587898 is an apocalyptic number.

1247587898 is a deficient number, since it is larger than the sum of its proper divisors (633490810).

1247587898 is a wasteful number, since it uses less digits than its factorization.

1247587898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3232288.

The product of its digits is 9031680, while the sum is 59.

The square root of 1247587898 is about 35321.2103133514. The cubic root of 1247587898 is about 1076.5240033517.

The spelling of 1247587898 in words is "one billion, two hundred forty-seven million, five hundred eighty-seven thousand, eight hundred ninety-eight".