42121235 has 8 divisors (see below), whose sum is σ = 54433680. Its totient is φ = 31104864.

The previous prime is 42121231. The next prime is 42121243. The reversal of 42121235 is 53212124.

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 42121235 - 2² = 42121231 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42121231) 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, 323945 + ... + 324074.

It is an arithmetic number, because the mean of its divisors is an integer number (6804210).

Almost surely, 2^42121235 is an apocalyptic number.

42121235 is a deficient number, since it is larger than the sum of its proper divisors (12312445).

42121235 is a wasteful number, since it uses less digits than its factorization.

42121235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648037.

The product of its digits is 480, while the sum is 20.

The square root of 42121235 is about 6490.0874416297. The cubic root of 42121235 is about 347.9368004093.

Adding to 42121235 its reverse (53212124), we get a palindrome (95333359).

The spelling of 42121235 in words is "forty-two million, one hundred twenty-one thousand, two hundred thirty-five".