1242085550 has 12 divisors (see below), whose sum is σ = 2310279216. Its totient is φ = 496834200.

The previous prime is 1242085547. The next prime is 1242085553. The reversal of 1242085550 is 555802421.

It is an interprime number because it is at equal distance from previous prime (1242085547) and next prime (1242085553).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242085553) 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 5 ways as a sum of consecutive naturals, for example, 12420806 + ... + 12420905.

It is an arithmetic number, because the mean of its divisors is an integer number (192523268).

Almost surely, 2^1242085550 is an apocalyptic number.

1242085550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1242085550 is a deficient number, since it is larger than the sum of its proper divisors (1068193666).

1242085550 is a wasteful number, since it uses less digits than its factorization.

1242085550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24841723 (or 24841718 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 32.

The square root of 1242085550 is about 35243.2341024487. The cubic root of 1242085550 is about 1074.9390410719.

Adding to 1242085550 its reverse (555802421), we get a palindrome (1797887971).

The spelling of 1242085550 in words is "one billion, two hundred forty-two million, eighty-five thousand, five hundred fifty".