1262887540 has 12 divisors (see below), whose sum is σ = 2652063876. Its totient is φ = 505155008.

The previous prime is 1262887529. The next prime is 1262887547. The reversal of 1262887540 is 457882621.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 851122276 + 411765264 = 29174^2 + 20292^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1262887547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31572169 + ... + 31572208.

It is an arithmetic number, because the mean of its divisors is an integer number (221005323).

Almost surely, 2^1262887540 is an apocalyptic number.

1262887540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1262887540 is an abundant number, since it is smaller than the sum of its proper divisors (1389176336).

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

1262887540 is a wasteful number, since it uses less digits than its factorization.

1262887540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63144386 (or 63144384 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 43.

The square root of 1262887540 is about 35537.1290342931. The cubic root of 1262887540 is about 1080.9067430789.

The spelling of 1262887540 in words is "one billion, two hundred sixty-two million, eight hundred eighty-seven thousand, five hundred forty".