561042451 has 2 divisors, whose sum is σ = 561042452. Its totient is φ = 561042450.

The previous prime is 561042421. The next prime is 561042467. The reversal of 561042451 is 154240165.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 561042451 - 2¹³ = 561034259 is a prime.

It is not a weakly prime, because it can be changed into another prime (561042421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280521225 + 280521226.

It is an arithmetic number, because the mean of its divisors is an integer number (280521226).

Almost surely, 2^561042451 is an apocalyptic number.

561042451 is a deficient number, since it is larger than the sum of its proper divisors (1).

561042451 is an equidigital number, since it uses as much as digits as its factorization.

561042451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 561042451 is about 23686.3346890143. The cubic root of 561042451 is about 824.7681998298.

The spelling of 561042451 in words is "five hundred sixty-one million, forty-two thousand, four hundred fifty-one".