42162451 has 4 divisors (see below), whose sum is σ = 42318304. Its totient is φ = 42006600.

The previous prime is 42162443. The next prime is 42162467. The reversal of 42162451 is 15426124.

It is a happy number.

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 42162451 - 2³ = 42162443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42162751) 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 in 3 ways as a sum of consecutive naturals, for example, 77520 + ... + 78061.

It is an arithmetic number, because the mean of its divisors is an integer number (10579576).

Almost surely, 2^42162451 is an apocalyptic number.

42162451 is a deficient number, since it is larger than the sum of its proper divisors (155853).

42162451 is a wasteful number, since it uses less digits than its factorization.

42162451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155852.

The product of its digits is 1920, while the sum is 25.

The square root of 42162451 is about 6493.2619691493. The cubic root of 42162451 is about 348.0502498231.

Adding to 42162451 its reverse (15426124), we get a palindrome (57588575).

The spelling of 42162451 in words is "forty-two million, one hundred sixty-two thousand, four hundred fifty-one".