142948817 has 4 divisors (see below), whose sum is σ = 155944176. Its totient is φ = 129953460.

The previous prime is 142948789. The next prime is 142948823. The reversal of 142948817 is 718849241.

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.

It is a cyclic number.

It is not a de Polignac number, because 142948817 - 2¹⁸ = 142686673 is a prime.

It is a super-4 number, since 4×142948817⁴ (a number of 34 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142948847) 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, 6497663 + ... + 6497684.

It is an arithmetic number, because the mean of its divisors is an integer number (38986044).

Almost surely, 2^142948817 is an apocalyptic number.

It is an amenable number.

142948817 is a deficient number, since it is larger than the sum of its proper divisors (12995359).

142948817 is a wasteful number, since it uses less digits than its factorization.

142948817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12995358.

The product of its digits is 129024, while the sum is 44.

The square root of 142948817 is about 11956.1204828322. The cubic root of 142948817 is about 522.8697559021.

The spelling of 142948817 in words is "one hundred forty-two million, nine hundred forty-eight thousand, eight hundred seventeen".