1242553427 has 2 divisors, whose sum is σ = 1242553428. Its totient is φ = 1242553426.

The previous prime is 1242553397. The next prime is 1242553453. The reversal of 1242553427 is 7243552421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1242553427 - 2⁶ = 1242553363 is a prime.

It is not a weakly prime, because it can be changed into another prime (1242550427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621276713 + 621276714.

It is an arithmetic number, because the mean of its divisors is an integer number (621276714).

Almost surely, 2^1242553427 is an apocalyptic number.

1242553427 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242553427 is an equidigital number, since it uses as much as digits as its factorization.

1242553427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 67200, while the sum is 35.

The square root of 1242553427 is about 35249.8713047296. The cubic root of 1242553427 is about 1075.0739958439.

The spelling of 1242553427 in words is "one billion, two hundred forty-two million, five hundred fifty-three thousand, four hundred twenty-seven".