1242155053 has 2 divisors, whose sum is σ = 1242155054. Its totient is φ = 1242155052.

The previous prime is 1242155021. The next prime is 1242155071. The reversal of 1242155053 is 3505512421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 825872644 + 416282409 = 28738^2 + 20403^2 .

It is a cyclic number.

It is not a de Polignac number, because 1242155053 - 2⁵ = 1242155021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242155093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621077526 + 621077527.

It is an arithmetic number, because the mean of its divisors is an integer number (621077527).

Almost surely, 2^1242155053 is an apocalyptic number.

It is an amenable number.

1242155053 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242155053 is an equidigital number, since it uses as much as digits as its factorization.

1242155053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 1242155053 is about 35244.2201360734. The cubic root of 1242155053 is about 1074.9590907093.

Adding to 1242155053 its reverse (3505512421), we get a palindrome (4747667474).

The spelling of 1242155053 in words is "one billion, two hundred forty-two million, one hundred fifty-five thousand, fifty-three".