42661451 has 4 divisors (see below), whose sum is σ = 48755952. Its totient is φ = 36566952.

The previous prime is 42661447. The next prime is 42661469. The reversal of 42661451 is 15416624.

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 42661451 - 2² = 42661447 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42661471) 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, 3047240 + ... + 3047253.

It is an arithmetic number, because the mean of its divisors is an integer number (12188988).

Almost surely, 2^42661451 is an apocalyptic number.

42661451 is a deficient number, since it is larger than the sum of its proper divisors (6094501).

42661451 is an equidigital number, since it uses as much as digits as its factorization.

42661451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6094500.

The product of its digits is 5760, while the sum is 29.

The square root of 42661451 is about 6531.5733939075. The cubic root of 42661451 is about 349.4179468627.

The spelling of 42661451 in words is "forty-two million, six hundred sixty-one thousand, four hundred fifty-one".