1284326745 has 32 divisors (see below), whose sum is σ = 2284391424. Its totient is φ = 611884800.

The previous prime is 1284326737. The next prime is 1284326749. The reversal of 1284326745 is 5476234821.

It is not a de Polignac number, because 1284326745 - 2³ = 1284326737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1284326697 and 1284326706.

It is not an unprimeable number, because it can be changed into a prime (1284326749) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 100186 + ... + 112275.

It is an arithmetic number, because the mean of its divisors is an integer number (71387232).

Almost surely, 2^1284326745 is an apocalyptic number.

1284326745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1284326745 is a deficient number, since it is larger than the sum of its proper divisors (1000064679).

1284326745 is a wasteful number, since it uses less digits than its factorization.

1284326745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212513.

The product of its digits is 322560, while the sum is 42.

The square root of 1284326745 is about 35837.5047261943. The cubic root of 1284326745 is about 1086.9890658410.

The spelling of 1284326745 in words is "one billion, two hundred eighty-four million, three hundred twenty-six thousand, seven hundred forty-five".