145214989 has 16 divisors (see below), whose sum is σ = 152591040. Its totient is φ = 138067840.

The previous prime is 145214963. The next prime is 145215001. The reversal of 145214989 is 989412541.

145214989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 145214989 - 2¹⁵ = 145182221 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145214189) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 418314 + ... + 418660.

It is an arithmetic number, because the mean of its divisors is an integer number (9536940).

Almost surely, 2^145214989 is an apocalyptic number.

It is an amenable number.

145214989 is a deficient number, since it is larger than the sum of its proper divisors (7376051).

145214989 is a wasteful number, since it uses less digits than its factorization.

145214989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620.

The product of its digits is 103680, while the sum is 43.

The square root of 145214989 is about 12050.5182046251. The cubic root of 145214989 is about 525.6183058356.

The spelling of 145214989 in words is "one hundred forty-five million, two hundred fourteen thousand, nine hundred eighty-nine".