143145157 has 4 divisors (see below), whose sum is σ = 143169580. Its totient is φ = 143120736.

The previous prime is 143145139. The next prime is 143145161. The reversal of 143145157 is 751541341.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 751541341 = 337 ⋅2230093.

It can be written as a sum of positive squares in 2 ways, for example, as 84070561 + 59074596 = 9169^2 + 7686^2 .

It is a 3-Lehmer number, since φ(143145157) divides (143145157-1)³.

It is a cyclic number.

It is not a de Polignac number, because 143145157 - 2⁷ = 143145029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143145137) 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, 2443 + ... + 17095.

It is an arithmetic number, because the mean of its divisors is an integer number (35792395).

Almost surely, 2^143145157 is an apocalyptic number.

143145157 is the 9769-th pentagonal number.

It is an amenable number.

143145157 is a deficient number, since it is larger than the sum of its proper divisors (24423).

143145157 is an equidigital number, since it uses as much as digits as its factorization.

143145157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24422.

The product of its digits is 8400, while the sum is 31.

The square root of 143145157 is about 11964.3285227379. The cubic root of 143145157 is about 523.1090333457.

Adding to 143145157 its reverse (751541341), we get a palindrome (894686498).

The spelling of 143145157 in words is "one hundred forty-three million, one hundred forty-five thousand, one hundred fifty-seven".