42205451 has 8 divisors (see below), whose sum is σ = 42577920. Its totient is φ = 41835112.

The previous prime is 42205421. The next prime is 42205459. The reversal of 42205451 is 15450224.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42205451 - 2¹⁰ = 42204427 is a prime.

It is a super-2 number, since 2×42205451² = 3562600188226802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42205459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100520 + ... + 100938.

It is an arithmetic number, because the mean of its divisors is an integer number (5322240).

Almost surely, 2^42205451 is an apocalyptic number.

42205451 is a deficient number, since it is larger than the sum of its proper divisors (372469).

42205451 is a wasteful number, since it uses less digits than its factorization.

42205451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1065.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 42205451 is about 6496.5722500408. The cubic root of 42205451 is about 348.1685310223.

Adding to 42205451 its reverse (15450224), we get a palindrome (57655675).

The spelling of 42205451 in words is "forty-two million, two hundred five thousand, four hundred fifty-one".