1242965550 has 24 divisors (see below), whose sum is σ = 3082554936. Its totient is φ = 331457440.

The previous prime is 1242965533. The next prime is 1242965551. The reversal of 1242965550 is 555692421.

It is a junction number, because it is equal to n+sod(n) for n = 1242965499 and 1242965508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242965551) 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 11 ways as a sum of consecutive naturals, for example, 4143069 + ... + 4143368.

It is an arithmetic number, because the mean of its divisors is an integer number (128439789).

Almost surely, 2^1242965550 is an apocalyptic number.

1242965550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1242965550 is an abundant number, since it is smaller than the sum of its proper divisors (1839589386).

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

1242965550 is a wasteful number, since it uses less digits than its factorization.

1242965550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8286452 (or 8286447 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 39.

The square root of 1242965550 is about 35255.7165577442. The cubic root of 1242965550 is about 1075.1928408330.

The spelling of 1242965550 in words is "one billion, two hundred forty-two million, nine hundred sixty-five thousand, five hundred fifty".