146215649 has 4 divisors (see below), whose sum is σ = 148066560. Its totient is φ = 144364740.

The previous prime is 146215603. The next prime is 146215673. The reversal of 146215649 is 946512641.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 146215649 - 2¹² = 146211553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (146215679) 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, 925337 + ... + 925494.

It is an arithmetic number, because the mean of its divisors is an integer number (37016640).

Almost surely, 2^146215649 is an apocalyptic number.

It is an amenable number.

146215649 is a deficient number, since it is larger than the sum of its proper divisors (1850911).

146215649 is an equidigital number, since it uses as much as digits as its factorization.

146215649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1850910.

The product of its digits is 51840, while the sum is 38.

The square root of 146215649 is about 12091.9662999861. The cubic root of 146215649 is about 526.8228685767.

The spelling of 146215649 in words is "one hundred forty-six million, two hundred fifteen thousand, six hundred forty-nine".