742642451 has 2 divisors, whose sum is σ = 742642452. Its totient is φ = 742642450.

The previous prime is 742642447. The next prime is 742642489. The reversal of 742642451 is 154246247.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 742642451 - 2² = 742642447 is a prime.

It is not a weakly prime, because it can be changed into another prime (742642421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 371321225 + 371321226.

It is an arithmetic number, because the mean of its divisors is an integer number (371321226).

Almost surely, 2^742642451 is an apocalyptic number.

742642451 is a deficient number, since it is larger than the sum of its proper divisors (1).

742642451 is an equidigital number, since it uses as much as digits as its factorization.

742642451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 53760, while the sum is 35.

The square root of 742642451 is about 27251.4669513404. The cubic root of 742642451 is about 905.5795158892.

Adding to 742642451 its reverse (154246247), we get a palindrome (896888698).

The spelling of 742642451 in words is "seven hundred forty-two million, six hundred forty-two thousand, four hundred fifty-one".