1242264253 has 4 divisors (see below), whose sum is σ = 1242335260. Its totient is φ = 1242193248.

The previous prime is 1242264229. The next prime is 1242264263. The reversal of 1242264253 is 3524622421.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3524622421 = 27407 ⋅128603.

It can be written as a sum of positive squares in 2 ways, for example, as 636956644 + 605307609 = 25238^2 + 24603^2 .

It is a cyclic number.

It is not a de Polignac number, because 1242264253 - 2²¹ = 1240167101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242264203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11353 + ... + 51121.

It is an arithmetic number, because the mean of its divisors is an integer number (310583815).

Almost surely, 2^1242264253 is an apocalyptic number.

It is an amenable number.

1242264253 is a deficient number, since it is larger than the sum of its proper divisors (71007).

1242264253 is an equidigital number, since it uses as much as digits as its factorization.

1242264253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71006.

The product of its digits is 23040, while the sum is 31.

The square root of 1242264253 is about 35245.7692922143. The cubic root of 1242264253 is about 1074.9905902908.

Adding to 1242264253 its reverse (3524622421), we get a palindrome (4766886674).

The spelling of 1242264253 in words is "one billion, two hundred forty-two million, two hundred sixty-four thousand, two hundred fifty-three".