42154561 has 8 divisors (see below), whose sum is σ = 44052480. Its totient is φ = 40262112.

The previous prime is 42154547. The next prime is 42154573. The reversal of 42154561 is 16545124.

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 42154561 - 2⁵ = 42154529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42154531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28701 + ... + 30133.

It is an arithmetic number, because the mean of its divisors is an integer number (5506560).

Almost surely, 2^42154561 is an apocalyptic number.

It is an amenable number.

42154561 is a deficient number, since it is larger than the sum of its proper divisors (1897919).

42154561 is a wasteful number, since it uses less digits than its factorization.

42154561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2735.

The product of its digits is 4800, while the sum is 28.

The square root of 42154561 is about 6492.6543878448. The cubic root of 42154561 is about 348.0285378675.

Adding to 42154561 its reverse (16545124), we get a palindrome (58699685).

The spelling of 42154561 in words is "forty-two million, one hundred fifty-four thousand, five hundred sixty-one".