146191491 has 12 divisors (see below), whose sum is σ = 222279720. Its totient is φ = 92331360.

The previous prime is 146191481. The next prime is 146191501. The reversal of 146191491 is 194191641.

It is an interprime number because it is at equal distance from previous prime (146191481) and next prime (146191501).

It is not a de Polignac number, because 146191491 - 2¹⁰ = 146190467 is a prime.

It is not an unprimeable number, because it can be changed into a prime (146191411) 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 11 ways as a sum of consecutive naturals, for example, 427290 + ... + 427631.

It is an arithmetic number, because the mean of its divisors is an integer number (18523310).

Almost surely, 2^146191491 is an apocalyptic number.

146191491 is a deficient number, since it is larger than the sum of its proper divisors (76088229).

146191491 is a wasteful number, since it uses less digits than its factorization.

146191491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 854946 (or 854943 counting only the distinct ones).

The product of its digits is 7776, while the sum is 36.

The square root of 146191491 is about 12090.9673310286. The cubic root of 146191491 is about 526.7938527864.

It can be divided in two parts, 14619 and 1491, that added together give a triangular number (16110 = T₁₇₉).

The spelling of 146191491 in words is "one hundred forty-six million, one hundred ninety-one thousand, four hundred ninety-one".