1247224995 has 12 divisors (see below), whose sum is σ = 2161856736. Its totient is φ = 665186640.

The previous prime is 1247224987. The next prime is 1247225003. The reversal of 1247224995 is 5994227421.

It is an interprime number because it is at equal distance from previous prime (1247224987) and next prime (1247225003).

It is not a de Polignac number, because 1247224995 - 2³ = 1247224987 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 27716111 = 1247224995 / (1 + 2 + 4 + 7 + 2 + 2 + 4 + 9 + 9 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 1247224995.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13858011 + ... + 13858100.

It is an arithmetic number, because the mean of its divisors is an integer number (180154728).

Almost surely, 2^1247224995 is an apocalyptic number.

1247224995 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1247224995 is a deficient number, since it is larger than the sum of its proper divisors (914631741).

1247224995 is a wasteful number, since it uses less digits than its factorization.

1247224995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27716122 (or 27716119 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 1247224995 is about 35316.0727573155. The cubic root of 1247224995 is about 1076.4196121294.

The spelling of 1247224995 in words is "one billion, two hundred forty-seven million, two hundred twenty-four thousand, nine hundred ninety-five".