1242011525 has 12 divisors (see below), whose sum is σ = 1542684000. Its totient is φ = 991938480.

The previous prime is 1242011501. The next prime is 1242011531. The reversal of 1242011525 is 5251102421.

It is not a de Polignac number, because 1242011525 - 2¹⁶ = 1241945989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1242011525.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26495 + ... + 56444.

It is an arithmetic number, because the mean of its divisors is an integer number (128557000).

Almost surely, 2^1242011525 is an apocalyptic number.

It is an amenable number.

1242011525 is a deficient number, since it is larger than the sum of its proper divisors (300672475).

1242011525 is an equidigital number, since it uses as much as digits as its factorization.

1242011525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83548 (or 83543 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 1242011525 is about 35242.1838852248. The cubic root of 1242011525 is about 1074.9176861437.

Adding to 1242011525 its reverse (5251102421), we get a palindrome (6493113946).

The spelling of 1242011525 in words is "one billion, two hundred forty-two million, eleven thousand, five hundred twenty-five".