42061999 has 4 divisors (see below), whose sum is σ = 48070864. Its totient is φ = 36053136.

The previous prime is 42061979. The next prime is 42062003. The reversal of 42061999 is 99916024.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 42061999 - 2¹⁷ = 41930927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42061909) 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, 3004422 + ... + 3004435.

It is an arithmetic number, because the mean of its divisors is an integer number (12017716).

Almost surely, 2^42061999 is an apocalyptic number.

42061999 is a deficient number, since it is larger than the sum of its proper divisors (6008865).

42061999 is an equidigital number, since it uses as much as digits as its factorization.

42061999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6008864.

The product of its (nonzero) digits is 34992, while the sum is 40.

The square root of 42061999 is about 6485.5222611599. The cubic root of 42061999 is about 347.7736202187.

The spelling of 42061999 in words is "forty-two million, sixty-one thousand, nine hundred ninety-nine".