145729287 has 56 divisors (see below), whose sum is σ = 252614160. Its totient is φ = 83047680.

The previous prime is 145729271. The next prime is 145729303. The reversal of 145729287 is 782927541.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (145729271) and next prime (145729303).

It is not a de Polignac number, because 145729287 - 2⁴ = 145729271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145729237) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 135789 + ... + 136857.

Almost surely, 2^145729287 is an apocalyptic number.

145729287 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

145729287 is a deficient number, since it is larger than the sum of its proper divisors (106884873).

145729287 is a wasteful number, since it uses less digits than its factorization.

145729287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1115 (or 1100 counting only the distinct ones).

The product of its digits is 282240, while the sum is 45.

The square root of 145729287 is about 12071.8385923603. The cubic root of 145729287 is about 526.2380902024.

The spelling of 145729287 in words is "one hundred forty-five million, seven hundred twenty-nine thousand, two hundred eighty-seven".