1242150545 has 16 divisors (see below), whose sum is σ = 1525125888. Its totient is φ = 970769280.

The previous prime is 1242150529. The next prime is 1242150599. The reversal of 1242150545 is 5450512421.

It is not a de Polignac number, because 1242150545 - 2⁴ = 1242150529 is a prime.

It is a Duffinian 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 15 ways as a sum of consecutive naturals, for example, 129557 + ... + 138813.

It is an arithmetic number, because the mean of its divisors is an integer number (95320368).

Almost surely, 2^1242150545 is an apocalyptic number.

It is an amenable number.

1242150545 is a deficient number, since it is larger than the sum of its proper divisors (282975343).

1242150545 is an equidigital number, since it uses as much as digits as its factorization.

1242150545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9880.

The product of its (nonzero) digits is 8000, while the sum is 29.

The square root of 1242150545 is about 35244.1561822666. The cubic root of 1242150545 is about 1074.9577903023.

Adding to 1242150545 its reverse (5450512421), we get a palindrome (6692662966).

The spelling of 1242150545 in words is "one billion, two hundred forty-two million, one hundred fifty thousand, five hundred forty-five".