42061399 has 4 divisors (see below), whose sum is σ = 42329464. Its totient is φ = 41793336.

The previous prime is 42061387. The next prime is 42061423. The reversal of 42061399 is 99316024.

42061399 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 42061399 - 2²¹ = 39964247 is a prime.

It is a super-2 number, since 2×42061399² = 3538322571674402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42061309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133797 + ... + 134110.

It is an arithmetic number, because the mean of its divisors is an integer number (10582366).

Almost surely, 2^42061399 is an apocalyptic number.

42061399 is a deficient number, since it is larger than the sum of its proper divisors (268065).

42061399 is a wasteful number, since it uses less digits than its factorization.

42061399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268064.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 42061399 is about 6485.4760041187. The cubic root of 42061399 is about 347.7719665870.

The spelling of 42061399 in words is "forty-two million, sixty-one thousand, three hundred ninety-nine".