145057217 has 8 divisors (see below), whose sum is σ = 151208640. Its totient is φ = 138982480.

The previous prime is 145057183. The next prime is 145057219. The reversal of 145057217 is 712750541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 145057217 - 2¹⁸ = 144795073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145057219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15293 + ... + 22890.

It is an arithmetic number, because the mean of its divisors is an integer number (18901080).

Almost surely, 2^145057217 is an apocalyptic number.

It is an amenable number.

145057217 is a deficient number, since it is larger than the sum of its proper divisors (6151423).

145057217 is a wasteful number, since it uses less digits than its factorization.

145057217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38343.

The product of its (nonzero) digits is 9800, while the sum is 32.

The square root of 145057217 is about 12043.9701510756. The cubic root of 145057217 is about 525.4278803545.

The spelling of 145057217 in words is "one hundred forty-five million, fifty-seven thousand, two hundred seventeen".