146661540 has 24 divisors (see below), whose sum is σ = 410652480. Its totient is φ = 39109728.

The previous prime is 146661539. The next prime is 146661553. The reversal of 146661540 is 45166641.

It is a happy number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1222120 + ... + 1222239.

It is an arithmetic number, because the mean of its divisors is an integer number (17110520).

Almost surely, 2^146661540 is an apocalyptic number.

146661540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

146661540 is an abundant number, since it is smaller than the sum of its proper divisors (263990940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

146661540 is a wasteful number, since it uses less digits than its factorization.

146661540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2444371 (or 2444369 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 146661540 is about 12110.3897542565. The cubic root of 146661540 is about 527.3578482365.

The spelling of 146661540 in words is "one hundred forty-six million, six hundred sixty-one thousand, five hundred forty".