1284426247 has 16 divisors (see below), whose sum is σ = 1410121440. Its totient is φ = 1162732032.

The previous prime is 1284426223. The next prime is 1284426271. The reversal of 1284426247 is 7426244821.

It is an interprime number because it is at equal distance from previous prime (1284426223) and next prime (1284426271).

It is a cyclic number.

It is not a de Polignac number, because 1284426247 - 2¹⁹ = 1283901959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1284426287) 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, 199779 + ... + 206107.

It is an arithmetic number, because the mean of its divisors is an integer number (88132590).

Almost surely, 2^1284426247 is an apocalyptic number.

1284426247 is a deficient number, since it is larger than the sum of its proper divisors (125695193).

1284426247 is a wasteful number, since it uses less digits than its factorization.

1284426247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6642.

The product of its digits is 172032, while the sum is 40.

The square root of 1284426247 is about 35838.8929377011. The cubic root of 1284426247 is about 1087.0171362661.

It can be divided in two parts, 128442 and 6247, that added together give a square (134689 = 367²).

The spelling of 1284426247 in words is "one billion, two hundred eighty-four million, four hundred twenty-six thousand, two hundred forty-seven".