142661505 has 32 divisors (see below), whose sum is σ = 261540864. Its totient is φ = 65048256.

The previous prime is 142661503. The next prime is 142661537. The reversal of 142661505 is 505166241.

It is not a de Polignac number, because 142661505 - 2¹ = 142661503 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (142661503) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44982 + ... + 48048.

It is an arithmetic number, because the mean of its divisors is an integer number (8173152).

Almost surely, 2^142661505 is an apocalyptic number.

142661505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

142661505 is a deficient number, since it is larger than the sum of its proper divisors (118879359).

142661505 is a wasteful number, since it uses less digits than its factorization.

142661505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3525.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 142661505 is about 11944.0991707202. The cubic root of 142661505 is about 522.5192166494.

The spelling of 142661505 in words is "one hundred forty-two million, six hundred sixty-one thousand, five hundred five".