42136361 has 4 divisors (see below), whose sum is σ = 42644112. Its totient is φ = 41628612.

The previous prime is 42136349. The next prime is 42136379. The reversal of 42136361 is 16363124.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42136361 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42136361.

It is not an unprimeable number, because it can be changed into a prime (42136301) 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, 253751 + ... + 253916.

It is an arithmetic number, because the mean of its divisors is an integer number (10661028).

Almost surely, 2^42136361 is an apocalyptic number.

It is an amenable number.

42136361 is a deficient number, since it is larger than the sum of its proper divisors (507751).

42136361 is an equidigital number, since it uses as much as digits as its factorization.

42136361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507750.

The product of its digits is 2592, while the sum is 26.

The square root of 42136361 is about 6491.2526526087. The cubic root of 42136361 is about 347.9784441882.

Adding to 42136361 its reverse (16363124), we get a palindrome (58499485).

The spelling of 42136361 in words is "forty-two million, one hundred thirty-six thousand, three hundred sixty-one".