145505787 has 8 divisors (see below), whose sum is σ = 221723136. Its totient is φ = 83146152.

The previous prime is 145505779. The next prime is 145505813. The reversal of 145505787 is 787505541.

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

It is not a de Polignac number, because 145505787 - 2³ = 145505779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145505747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3464403 + ... + 3464444.

It is an arithmetic number, because the mean of its divisors is an integer number (27715392).

Almost surely, 2^145505787 is an apocalyptic number.

145505787 is a deficient number, since it is larger than the sum of its proper divisors (76217349).

145505787 is an equidigital number, since it uses as much as digits as its factorization.

145505787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6928857.

The product of its (nonzero) digits is 196000, while the sum is 42.

The square root of 145505787 is about 12062.5779582973. The cubic root of 145505787 is about 525.9689281284.

The spelling of 145505787 in words is "one hundred forty-five million, five hundred five thousand, seven hundred eighty-seven".