561006451 has 4 divisors (see below), whose sum is σ = 562218592. Its totient is φ = 559794312.

The previous prime is 561006437. The next prime is 561006461. The reversal of 561006451 is 154600165.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 561006451 - 2²⁹ = 24135539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561006401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 605376 + ... + 606301.

It is an arithmetic number, because the mean of its divisors is an integer number (140554648).

Almost surely, 2^561006451 is an apocalyptic number.

561006451 is a deficient number, since it is larger than the sum of its proper divisors (1212141).

561006451 is a wasteful number, since it uses less digits than its factorization.

561006451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1212140.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 561006451 is about 23685.5747449793. The cubic root of 561006451 is about 824.7505586868.

The spelling of 561006451 in words is "five hundred sixty-one million, six thousand, four hundred fifty-one".