1242476440 has 16 divisors (see below), whose sum is σ = 2795572080. Its totient is φ = 496990560.

The previous prime is 1242476437. The next prime is 1242476441. The reversal of 1242476440 is 446742421.

It is a junction number, because it is equal to n+sod(n) for n = 1242476396 and 1242476405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242476441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15530916 + ... + 15530995.

It is an arithmetic number, because the mean of its divisors is an integer number (174723255).

Almost surely, 2^1242476440 is an apocalyptic number.

1242476440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1242476440 is an abundant number, since it is smaller than the sum of its proper divisors (1553095640).

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

1242476440 is a wasteful number, since it uses less digits than its factorization.

1242476440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31061922 (or 31061918 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 34.

The square root of 1242476440 is about 35248.7792696428. The cubic root of 1242476440 is about 1075.0517919882.

The spelling of 1242476440 in words is "one billion, two hundred forty-two million, four hundred seventy-six thousand, four hundred forty".