145249887 has 8 divisors (see below), whose sum is σ = 205058736. Its totient is φ = 91137152.

The previous prime is 145249859. The next prime is 145249933. The reversal of 145249887 is 788942541.

It is a happy number.

145249887 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 145249887 - 2⁶ = 145249823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145249847) 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, 1423968 + ... + 1424069.

It is an arithmetic number, because the mean of its divisors is an integer number (25632342).

Almost surely, 2^145249887 is an apocalyptic number.

145249887 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

145249887 is a deficient number, since it is larger than the sum of its proper divisors (59808849).

145249887 is a wasteful number, since it uses less digits than its factorization.

145249887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2848057.

The product of its digits is 645120, while the sum is 48.

The square root of 145249887 is about 12051.9661051631. The cubic root of 145249887 is about 525.6604079137.

The spelling of 145249887 in words is "one hundred forty-five million, two hundred forty-nine thousand, eight hundred eighty-seven".