1242552241 has 24 divisors (see below), whose sum is σ = 1535737320. Its totient is φ = 1000484352.

The previous prime is 1242552187. The next prime is 1242552251. The reversal of 1242552241 is 1422552421.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 731973025 + 510579216 = 27055^2 + 22596^2 .

It is not a de Polignac number, because 1242552241 - 2¹¹ = 1242550193 is a prime.

It is a super-2 number, since 2×1242552241² = 3087872143228244162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1242552251) 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 23 ways as a sum of consecutive naturals, for example, 40761 + ... + 64393.

It is an arithmetic number, because the mean of its divisors is an integer number (63989055).

Almost surely, 2^1242552241 is an apocalyptic number.

It is an amenable number.

1242552241 is a deficient number, since it is larger than the sum of its proper divisors (293185079).

1242552241 is a wasteful number, since it uses less digits than its factorization.

1242552241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23713 (or 23706 counting only the distinct ones).

The product of its digits is 6400, while the sum is 28.

The square root of 1242552241 is about 35249.8544819691. The cubic root of 1242552241 is about 1075.0736537961.

The spelling of 1242552241 in words is "one billion, two hundred forty-two million, five hundred fifty-two thousand, two hundred forty-one".