1247879541 has 16 divisors (see below), whose sum is σ = 1753695360. Its totient is φ = 788074560.

The previous prime is 1247879539. The next prime is 1247879551. The reversal of 1247879541 is 1459787421.

It is not a de Polignac number, because 1247879541 - 2¹ = 1247879539 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1247879551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130705 + ... + 139926.

It is an arithmetic number, because the mean of its divisors is an integer number (109605960).

Almost surely, 2^1247879541 is an apocalyptic number.

It is an amenable number.

1247879541 is a deficient number, since it is larger than the sum of its proper divisors (505815819).

1247879541 is a wasteful number, since it uses less digits than its factorization.

1247879541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270716.

The product of its digits is 564480, while the sum is 48.

The square root of 1247879541 is about 35325.3385121785. The cubic root of 1247879541 is about 1076.6078815375.

The spelling of 1247879541 in words is "one billion, two hundred forty-seven million, eight hundred seventy-nine thousand, five hundred forty-one".