742781449 has 2 divisors, whose sum is σ = 742781450. Its totient is φ = 742781448.

The previous prime is 742781419. The next prime is 742781489. The reversal of 742781449 is 944187247.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 371525625 + 371255824 = 19275^2 + 19268^2 .

It is a cyclic number.

It is not a de Polignac number, because 742781449 - 2¹³ = 742773257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 742781399 and 742781408.

It is not a weakly prime, because it can be changed into another prime (742781419) 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, 371390724 + 371390725.

It is an arithmetic number, because the mean of its divisors is an integer number (371390725).

Almost surely, 2^742781449 is an apocalyptic number.

It is an amenable number.

742781449 is a deficient number, since it is larger than the sum of its proper divisors (1).

742781449 is an equidigital number, since it uses as much as digits as its factorization.

742781449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 451584, while the sum is 46.

The square root of 742781449 is about 27254.0171167481. The cubic root of 742781449 is about 905.6360105002.

The spelling of 742781449 in words is "seven hundred forty-two million, seven hundred eighty-one thousand, four hundred forty-nine".