146135891 has 8 divisors (see below), whose sum is σ = 164563968. Its totient is φ = 128565000.

The previous prime is 146135867. The next prime is 146135909. The reversal of 146135891 is 198531641.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 146135891 - 2¹⁸ = 145873747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (146135851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213935 + ... + 214616.

It is an arithmetic number, because the mean of its divisors is an integer number (20570496).

Almost surely, 2^146135891 is an apocalyptic number.

146135891 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

146135891 is a deficient number, since it is larger than the sum of its proper divisors (18428077).

146135891 is a wasteful number, since it uses less digits than its factorization.

146135891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428593.

The product of its digits is 25920, while the sum is 38.

The square root of 146135891 is about 12088.6678753285. The cubic root of 146135891 is about 526.7270603623.

The spelling of 146135891 in words is "one hundred forty-six million, one hundred thirty-five thousand, eight hundred ninety-one".