146221405 has 16 divisors (see below), whose sum is σ = 191678400. Its totient is φ = 106197760.

The previous prime is 146221381. The next prime is 146221417. The reversal of 146221405 is 504122641.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-146221405 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 146221405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54741 + ... + 57349.

It is an arithmetic number, because the mean of its divisors is an integer number (11979900).

Almost surely, 2^146221405 is an apocalyptic number.

It is an amenable number.

146221405 is a deficient number, since it is larger than the sum of its proper divisors (45456995).

146221405 is a wasteful number, since it uses less digits than its factorization.

146221405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3644.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 146221405 is about 12092.2043069078. The cubic root of 146221405 is about 526.8297815455.

The spelling of 146221405 in words is "one hundred forty-six million, two hundred twenty-one thousand, four hundred five".