142426665 has 24 divisors (see below), whose sum is σ = 249325128. Its totient is φ = 75206400.

The previous prime is 142426637. The next prime is 142426667. The reversal of 142426665 is 566624241.

It can be written as a sum of positive squares in 4 ways, for example, as 87385104 + 55041561 = 9348^2 + 7419^2 .

It is not a de Polignac number, because 142426665 - 2⁶ = 142426601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (142426667) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11124 + ... + 20213.

It is an arithmetic number, because the mean of its divisors is an integer number (10388547).

Almost surely, 2^142426665 is an apocalyptic number.

142426665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

142426665 is a deficient number, since it is larger than the sum of its proper divisors (106898463).

142426665 is a wasteful number, since it uses less digits than its factorization.

142426665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31449 (or 31446 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 142426665 is about 11934.2643258812. The cubic root of 142426665 is about 522.2323469107.

The spelling of 142426665 in words is "one hundred forty-two million, four hundred twenty-six thousand, six hundred sixty-five".