1263041540 has 24 divisors (see below), whose sum is σ = 2653949760. Its totient is φ = 504919008.

The previous prime is 1263041501. The next prime is 1263041557. The reversal of 1263041540 is 451403621.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17951 + ... + 53369.

It is an arithmetic number, because the mean of its divisors is an integer number (110581240).

Almost surely, 2^1263041540 is an apocalyptic number.

1263041540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1263041540 is an abundant number, since it is smaller than the sum of its proper divisors (1390908220).

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

1263041540 is a wasteful number, since it uses less digits than its factorization.

1263041540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37211 (or 37209 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 1263041540 is about 35539.2957161506. The cubic root of 1263041540 is about 1080.9506775458.

The spelling of 1263041540 in words is "one billion, two hundred sixty-three million, forty-one thousand, five hundred forty".