145711647 has 18 divisors (see below), whose sum is σ = 219885432. Its totient is φ = 92806824.

The previous prime is 145711639. The next prime is 145711669. The reversal of 145711647 is 746117541.

145711647 is a `hidden beast` number, since 1 + 4 + 5 + 7 + 1 + 1 + 647 = 666.

It is not a de Polignac number, because 145711647 - 2³ = 145711639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145718647) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 173254 + ... + 174092.

Almost surely, 2^145711647 is an apocalyptic number.

145711647 is a deficient number, since it is larger than the sum of its proper divisors (74173785).

145711647 is an frugal number, since it uses more digits than its factorization.

145711647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1707 (or 865 counting only the distinct ones).

The product of its digits is 23520, while the sum is 36.

The square root of 145711647 is about 12071.1079441781. The cubic root of 145711647 is about 526.2168562768.

The spelling of 145711647 in words is "one hundred forty-five million, seven hundred eleven thousand, six hundred forty-seven".