1242352451 has 2 divisors, whose sum is σ = 1242352452. Its totient is φ = 1242352450.

The previous prime is 1242352421. The next prime is 1242352477. The reversal of 1242352451 is 1542532421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1242352451 - 2²² = 1238158147 is a prime.

It is a super-2 number, since 2×1242352451² = 3086879225011414802, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1242352421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621176225 + 621176226.

It is an arithmetic number, because the mean of its divisors is an integer number (621176226).

Almost surely, 2^1242352451 is an apocalyptic number.

1242352451 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242352451 is an equidigital number, since it uses as much as digits as its factorization.

1242352451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9600, while the sum is 29.

The square root of 1242352451 is about 35247.0204556357. The cubic root of 1242352451 is about 1075.0160303360.

Adding to 1242352451 its reverse (1542532421), we get a palindrome (2784884872).

The spelling of 1242352451 in words is "one billion, two hundred forty-two million, three hundred fifty-two thousand, four hundred fifty-one".