142977617 has 4 divisors (see below), whose sum is σ = 143040000. Its totient is φ = 142915236.

The previous prime is 142977613. The next prime is 142977631. The reversal of 142977617 is 716779241.

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: 716779241 = 31 ⋅23121911.

It is a cyclic number.

It is not a de Polignac number, because 142977617 - 2² = 142977613 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142977613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27617 + ... + 32382.

It is an arithmetic number, because the mean of its divisors is an integer number (35760000).

Almost surely, 2^142977617 is an apocalyptic number.

It is an amenable number.

142977617 is a deficient number, since it is larger than the sum of its proper divisors (62383).

142977617 is an equidigital number, since it uses as much as digits as its factorization.

142977617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62382.

The product of its digits is 148176, while the sum is 44.

The square root of 142977617 is about 11957.3248262310. The cubic root of 142977617 is about 522.9048678583.

The spelling of 142977617 in words is "one hundred forty-two million, nine hundred seventy-seven thousand, six hundred seventeen".