1263241240 has 32 divisors (see below), whose sum is σ = 2849748480. Its totient is φ = 503971072.

The previous prime is 1263241237. The next prime is 1263241261. The reversal of 1263241240 is 421423621.

It is a happy number.

It is a congruent number.

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, 25909 + ... + 56548.

It is an arithmetic number, because the mean of its divisors is an integer number (89054640).

Almost surely, 2^1263241240 is an apocalyptic number.

1263241240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1263241240 is an abundant number, since it is smaller than the sum of its proper divisors (1586507240).

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

1263241240 is a wasteful number, since it uses less digits than its factorization.

1263241240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82851 (or 82847 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 1263241240 is about 35542.1051711910. The cubic root of 1263241240 is about 1081.0076443907.

Adding to 1263241240 its reverse (421423621), we get a palindrome (1684664861).

The spelling of 1263241240 in words is "one billion, two hundred sixty-three million, two hundred forty-one thousand, two hundred forty".