145392647 has 4 divisors (see below), whose sum is σ = 149322216. Its totient is φ = 141463080.

The previous prime is 145392641. The next prime is 145392661. The reversal of 145392647 is 746293541.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 145392647 - 2⁸ = 145392391 is a prime.

It is a super-2 number, since 2×145392647² = 42278043603333218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145392641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1964729 + ... + 1964802.

It is an arithmetic number, because the mean of its divisors is an integer number (37330554).

Almost surely, 2^145392647 is an apocalyptic number.

145392647 is a deficient number, since it is larger than the sum of its proper divisors (3929569).

145392647 is an equidigital number, since it uses as much as digits as its factorization.

145392647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3929568.

The product of its digits is 181440, while the sum is 41.

The square root of 145392647 is about 12057.8873356820. The cubic root of 145392647 is about 525.8325680192.

The spelling of 145392647 in words is "one hundred forty-five million, three hundred ninety-two thousand, six hundred forty-seven".