1247160687 has 4 divisors (see below), whose sum is σ = 1662880920. Its totient is φ = 831440456.

The previous prime is 1247160643. The next prime is 1247160709. The reversal of 1247160687 is 7860617421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1247160687 - 2⁷ = 1247160559 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1247160637) 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, 207860112 + ... + 207860117.

It is an arithmetic number, because the mean of its divisors is an integer number (415720230).

Almost surely, 2^1247160687 is an apocalyptic number.

1247160687 is a deficient number, since it is larger than the sum of its proper divisors (415720233).

1247160687 is an equidigital number, since it uses as much as digits as its factorization.

1247160687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415720232.

The product of its (nonzero) digits is 112896, while the sum is 42.

The square root of 1247160687 is about 35315.1622819434. The cubic root of 1247160687 is about 1076.4011114359.

The spelling of 1247160687 in words is "one billion, two hundred forty-seven million, one hundred sixty thousand, six hundred eighty-seven".