1287564474 has 48 divisors (see below), whose sum is σ = 3005983008. Its totient is φ = 366595488.

The previous prime is 1287564433. The next prime is 1287564511. The reversal of 1287564474 is 4744657821.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 78669 + ... + 93615.

It is an arithmetic number, because the mean of its divisors is an integer number (62624646).

Almost surely, 2^1287564474 is an apocalyptic number.

1287564474 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1287564474, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1502991504).

1287564474 is an abundant number, since it is smaller than the sum of its proper divisors (1718418534).

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

1287564474 is a wasteful number, since it uses less digits than its factorization.

1287564474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15259 (or 15252 counting only the distinct ones).

The product of its digits is 1505280, while the sum is 48.

The square root of 1287564474 is about 35882.6486480583. The cubic root of 1287564474 is about 1087.9017159317.

The spelling of 1287564474 in words is "one billion, two hundred eighty-seven million, five hundred sixty-four thousand, four hundred seventy-four".