1242500539 has 16 divisors (see below), whose sum is σ = 1514524608. Its totient is φ = 995023872.

The previous prime is 1242500537. The next prime is 1242500551. The reversal of 1242500539 is 9350052421.

It is not a de Polignac number, because 1242500539 - 2¹ = 1242500537 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1242500539.

It is not an unprimeable number, because it can be changed into a prime (1242500537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21804 + ... + 54409.

It is an arithmetic number, because the mean of its divisors is an integer number (94657788).

Almost surely, 2^1242500539 is an apocalyptic number.

1242500539 is a deficient number, since it is larger than the sum of its proper divisors (272024069).

1242500539 is a wasteful number, since it uses less digits than its factorization.

1242500539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76374.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 1242500539 is about 35249.1211096107. The cubic root of 1242500539 is about 1075.0587424904.

The spelling of 1242500539 in words is "one billion, two hundred forty-two million, five hundred thousand, five hundred thirty-nine".