42154051 has 4 divisors (see below), whose sum is σ = 42192712. Its totient is φ = 42115392.

The previous prime is 42154043. The next prime is 42154087. The reversal of 42154051 is 15045124.

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 42154051 - 2³ = 42154043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42154001) 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, 17646 + ... + 19891.

It is an arithmetic number, because the mean of its divisors is an integer number (10548178).

Almost surely, 2^42154051 is an apocalyptic number.

42154051 is a deficient number, since it is larger than the sum of its proper divisors (38661).

42154051 is a wasteful number, since it uses less digits than its factorization.

42154051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38660.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 42154051 is about 6492.6151125721. The cubic root of 42154051 is about 348.0271343399.

Adding to 42154051 its reverse (15045124), we get a palindrome (57199175).

The spelling of 42154051 in words is "forty-two million, one hundred fifty-four thousand, fifty-one".