2742751421 has 2 divisors, whose sum is σ = 2742751422. Its totient is φ = 2742751420.

The previous prime is 2742751409. The next prime is 2742751469. The reversal of 2742751421 is 1241572472.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2235871225 + 506880196 = 47285^2 + 22514^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2742751421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2742751021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1371375710 + 1371375711.

It is an arithmetic number, because the mean of its divisors is an integer number (1371375711).

Almost surely, 2^2742751421 is an apocalyptic number.

It is an amenable number.

2742751421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2742751421 is an equidigital number, since it uses as much as digits as its factorization.

2742751421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31360, while the sum is 35.

The square root of 2742751421 is about 52371.2843168850. The cubic root of 2742751421 is about 1399.7876244176.

The spelling of 2742751421 in words is "two billion, seven hundred forty-two million, seven hundred fifty-one thousand, four hundred twenty-one".