1242781632 has 84 divisors (see below), whose sum is σ = 3717127440. Its totient is φ = 396244992.

The previous prime is 1242781607. The next prime is 1242781649. The reversal of 1242781632 is 2361872421.

It is a happy number.

1242781632 is a `hidden beast` number, since 12 + 4 + 2 + 7 + 8 + 1 + 632 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 33657 + ... + 60152.

Almost surely, 2^1242781632 is an apocalyptic number.

1242781632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1242781632 is an abundant number, since it is smaller than the sum of its proper divisors (2474345808).

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

1242781632 is a wasteful number, since it uses less digits than its factorization.

1242781632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93850 (or 93837 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 1242781632 is about 35253.1081182922. The cubic root of 1242781632 is about 1075.1398071639.

The spelling of 1242781632 in words is "one billion, two hundred forty-two million, seven hundred eighty-one thousand, six hundred thirty-two".