399146126 has 4 divisors (see below), whose sum is σ = 598719192. Its totient is φ = 199573062.

The previous prime is 399146123. The next prime is 399146191. The reversal of 399146126 is 621641993.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 621641993 = 7 ⋅88805999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399146123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99786530 + ... + 99786533.

It is an arithmetic number, because the mean of its divisors is an integer number (149679798).

Almost surely, 2^399146126 is an apocalyptic number.

399146126 is a deficient number, since it is larger than the sum of its proper divisors (199573066).

399146126 is a wasteful number, since it uses less digits than its factorization.

399146126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199573065.

The product of its digits is 69984, while the sum is 41.

The square root of 399146126 is about 19978.6417456243. The cubic root of 399146126 is about 736.2816431066.

The spelling of 399146126 in words is "three hundred ninety-nine million, one hundred forty-six thousand, one hundred twenty-six".