42648451 has 2 divisors, whose sum is σ = 42648452. Its totient is φ = 42648450.

The previous prime is 42648443. The next prime is 42648469. The reversal of 42648451 is 15484624.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42648451 - 2³ = 42648443 is a prime.

It is not a weakly prime, because it can be changed into another prime (42648421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21324225 + 21324226.

It is an arithmetic number, because the mean of its divisors is an integer number (21324226).

Almost surely, 2^42648451 is an apocalyptic number.

42648451 is a deficient number, since it is larger than the sum of its proper divisors (1).

42648451 is an equidigital number, since it uses as much as digits as its factorization.

42648451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30720, while the sum is 34.

The square root of 42648451 is about 6530.5781520475. The cubic root of 42648451 is about 349.3824511581.

The spelling of 42648451 in words is "forty-two million, six hundred forty-eight thousand, four hundred fifty-one".