145199547 has 18 divisors (see below), whose sum is σ = 217782292. Its totient is φ = 96674472.

The previous prime is 145199543. The next prime is 145199599. The reversal of 145199547 is 745991541.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

145199547 is a `hidden beast` number, since 1 + 4 + 519 + 95 + 47 = 666.

It is not a de Polignac number, because 145199547 - 2² = 145199543 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145199543) 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, 187453 + ... + 188225.

Almost surely, 2^145199547 is an apocalyptic number.

145199547 is a deficient number, since it is larger than the sum of its proper divisors (72582745).

145199547 is an frugal number, since it uses more digits than its factorization.

145199547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1561 (or 776 counting only the distinct ones).

The product of its digits is 226800, while the sum is 45.

The square root of 145199547 is about 12049.8774682567. The cubic root of 145199547 is about 525.5996739536.

The spelling of 145199547 in words is "one hundred forty-five million, one hundred ninety-nine thousand, five hundred forty-seven".