145888391 has 8 divisors (see below), whose sum is σ = 159298704. Its totient is φ = 132502720.

The previous prime is 145888381. The next prime is 145888397. The reversal of 145888391 is 193888541.

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 145888391 - 2¹⁴ = 145872007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145888397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7565 + ... + 18681.

It is an arithmetic number, because the mean of its divisors is an integer number (19912338).

Almost surely, 2^145888391 is an apocalyptic number.

145888391 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

145888391 is a deficient number, since it is larger than the sum of its proper divisors (13410313).

145888391 is a wasteful number, since it uses less digits than its factorization.

145888391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12321.

The product of its digits is 276480, while the sum is 47.

The square root of 145888391 is about 12078.4266773450. The cubic root of 145888391 is about 526.4295322363.

The spelling of 145888391 in words is "one hundred forty-five million, eight hundred eighty-eight thousand, three hundred ninety-one".