146406139 has 4 divisors (see below), whose sum is σ = 159715800. Its totient is φ = 133096480.

The previous prime is 146406137. The next prime is 146406163. The reversal of 146406139 is 931604641.

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

It is not a de Polignac number, because 146406139 - 2¹ = 146406137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (146406131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6654814 + ... + 6654835.

It is an arithmetic number, because the mean of its divisors is an integer number (39928950).

Almost surely, 2^146406139 is an apocalyptic number.

146406139 is a deficient number, since it is larger than the sum of its proper divisors (13309661).

146406139 is a wasteful number, since it uses less digits than its factorization.

146406139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13309660.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 146406139 is about 12099.8404534936. The cubic root of 146406139 is about 527.0515512104.

It can be divided in two parts, 1464061 and 39, that added together give a square (1464100 = 1210²).

The spelling of 146406139 in words is "one hundred forty-six million, four hundred six thousand, one hundred thirty-nine".