1284257748 has 12 divisors (see below), whose sum is σ = 2996601440. Its totient is φ = 428085912.

The previous prime is 1284257731. The next prime is 1284257749. The reversal of 1284257748 is 8477524821.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 1284257697 and 1284257706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1284257749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53510728 + ... + 53510751.

Almost surely, 2^1284257748 is an apocalyptic number.

It is an amenable number.

1284257748 is an abundant number, since it is smaller than the sum of its proper divisors (1712343692).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1284257748 is a wasteful number, since it uses less digits than its factorization.

1284257748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107021486 (or 107021484 counting only the distinct ones).

The product of its digits is 1003520, while the sum is 48.

The square root of 1284257748 is about 35836.5420764895. The cubic root of 1284257748 is about 1086.9696003045.

The spelling of 1284257748 in words is "one billion, two hundred eighty-four million, two hundred fifty-seven thousand, seven hundred forty-eight".