145641547 has 4 divisors (see below), whose sum is σ = 145749456. Its totient is φ = 145533640.

The previous prime is 145641541. The next prime is 145641563. The reversal of 145641547 is 745146541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 745146541 = 19 ⋅39218239.

It is a cyclic number.

It is not a de Polignac number, because 145641547 - 2¹¹ = 145639499 is a prime.

It is a super-2 number, since 2×145641547² = 42422920425106418, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145641541) 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, 51904 + ... + 54637.

It is an arithmetic number, because the mean of its divisors is an integer number (36437364).

Almost surely, 2^145641547 is an apocalyptic number.

145641547 is a deficient number, since it is larger than the sum of its proper divisors (107909).

145641547 is a wasteful number, since it uses less digits than its factorization.

145641547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107908.

The product of its digits is 67200, while the sum is 37.

The square root of 145641547 is about 12068.2039674510. The cubic root of 145641547 is about 526.1324573529.

The spelling of 145641547 in words is "one hundred forty-five million, six hundred forty-one thousand, five hundred forty-seven".