1242525133 has 4 divisors (see below), whose sum is σ = 1247999040. Its totient is φ = 1237051228.

The previous prime is 1242525127. The next prime is 1242525139. The reversal of 1242525133 is 3315252421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (1242525127) and next prime (1242525139).

It is a cyclic number.

It is not a de Polignac number, because 1242525133 - 2⁵ = 1242525101 is a prime.

It is a super-2 number, since 2×1242525133² = 3087737412273335378, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242525139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2736613 + ... + 2737066.

It is an arithmetic number, because the mean of its divisors is an integer number (311999760).

Almost surely, 2^1242525133 is an apocalyptic number.

It is an amenable number.

1242525133 is a deficient number, since it is larger than the sum of its proper divisors (5473907).

1242525133 is an equidigital number, since it uses as much as digits as its factorization.

1242525133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5473906.

The product of its digits is 7200, while the sum is 28.

The square root of 1242525133 is about 35249.4699676463. The cubic root of 1242525133 is about 1075.0658356651.

Adding to 1242525133 its reverse (3315252421), we get a palindrome (4557777554).

The spelling of 1242525133 in words is "one billion, two hundred forty-two million, five hundred twenty-five thousand, one hundred thirty-three".