145098217 has 4 divisors (see below), whose sum is σ = 158288976. Its totient is φ = 131907460.

The previous prime is 145098209. The next prime is 145098229. The reversal of 145098217 is 712890541.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 712890541 = 11 ⋅64808231.

It is a cyclic number.

It is not a de Polignac number, because 145098217 - 2³ = 145098209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145098257) 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, 6595363 + ... + 6595384.

It is an arithmetic number, because the mean of its divisors is an integer number (39572244).

Almost surely, 2^145098217 is an apocalyptic number.

It is an amenable number.

145098217 is a deficient number, since it is larger than the sum of its proper divisors (13190759).

145098217 is a wasteful number, since it uses less digits than its factorization.

145098217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13190758.

The product of its (nonzero) digits is 20160, while the sum is 37.

The square root of 145098217 is about 12045.6721273659. The cubic root of 145098217 is about 525.4773792447.

The spelling of 145098217 in words is "one hundred forty-five million, ninety-eight thousand, two hundred seventeen".