1247044407 has 16 divisors (see below), whose sum is σ = 1904240640. Its totient is φ = 711103392.

The previous prime is 1247044387. The next prime is 1247044427. The reversal of 1247044407 is 7044407421.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1247044387) and next prime (1247044427).

It is not a de Polignac number, because 1247044407 - 2⁶ = 1247044343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1247044427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51928 + ... + 72045.

It is an arithmetic number, because the mean of its divisors is an integer number (119015040).

Almost surely, 2^1247044407 is an apocalyptic number.

1247044407 is a deficient number, since it is larger than the sum of its proper divisors (657196233).

1247044407 is a wasteful number, since it uses less digits than its factorization.

1247044407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124462.

The product of its (nonzero) digits is 25088, while the sum is 33.

The square root of 1247044407 is about 35313.5159252091. The cubic root of 1247044407 is about 1076.3676573636.

The spelling of 1247044407 in words is "one billion, two hundred forty-seven million, forty-four thousand, four hundred seven".