145689424 has 20 divisors (see below), whose sum is σ = 289903444. Its totient is φ = 70875648.

The previous prime is 145689419. The next prime is 145689433. The reversal of 145689424 is 424986541.

It can be written as a sum of positive squares in 2 ways, for example, as 140849424 + 4840000 = 11868^2 + 2200^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122457 + ... + 123640.

Almost surely, 2^145689424 is an apocalyptic number.

It is an amenable number.

145689424 is a deficient number, since it is larger than the sum of its proper divisors (144214020).

145689424 is a wasteful number, since it uses less digits than its factorization.

145689424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246142 (or 246136 counting only the distinct ones).

The product of its digits is 276480, while the sum is 43.

The square root of 145689424 is about 12070.1874053388. The cubic root of 145689424 is about 526.1901031838.

The spelling of 145689424 in words is "one hundred forty-five million, six hundred eighty-nine thousand, four hundred twenty-four".