145148891 has 8 divisors (see below), whose sum is σ = 149328144. Its totient is φ = 140983200.

The previous prime is 145148881. The next prime is 145148947. The reversal of 145148891 is 198841541.

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 145148891 - 2⁶ = 145148827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145148881) 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, 20741 + ... + 26841.

It is an arithmetic number, because the mean of its divisors is an integer number (18666018).

Almost surely, 2^145148891 is an apocalyptic number.

145148891 is a deficient number, since it is larger than the sum of its proper divisors (4179253).

145148891 is an equidigital number, since it uses as much as digits as its factorization.

145148891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6781.

The product of its digits is 46080, while the sum is 41.

The square root of 145148891 is about 12047.7753548114. The cubic root of 145148891 is about 525.5385445758.

The spelling of 145148891 in words is "one hundred forty-five million, one hundred forty-eight thousand, eight hundred ninety-one".