1247041870 has 16 divisors (see below), whose sum is σ = 2276291808. Its totient is φ = 491790880.

The previous prime is 1247041841. The next prime is 1247041903. The reversal of 1247041870 is 781407421.

It is a super-2 number, since 2×1247041870² = 3110226851066193800, which contains 22 as substring.

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, 877489 + ... + 878908.

It is an arithmetic number, because the mean of its divisors is an integer number (142268238).

Almost surely, 2^1247041870 is an apocalyptic number.

1247041870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1247041870 is a deficient number, since it is larger than the sum of its proper divisors (1029249938).

1247041870 is a wasteful number, since it uses less digits than its factorization.

1247041870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1756475.

The product of its (nonzero) digits is 12544, while the sum is 34.

The square root of 1247041870 is about 35313.4800041004. The cubic root of 1247041870 is about 1076.3669274386.

The spelling of 1247041870 in words is "one billion, two hundred forty-seven million, forty-one thousand, eight hundred seventy".