142561215 has 40 divisors (see below), whose sum is σ = 258694128. Its totient is φ = 75098880.

The previous prime is 142561213. The next prime is 142561277. The reversal of 142561215 is 512165241.

142561215 is a `hidden beast` number, since 1 + 42 + 5 + 612 + 1 + 5 = 666.

It is not a de Polignac number, because 142561215 - 2¹ = 142561213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142561213) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 31495 + ... + 35735.

Almost surely, 2^142561215 is an apocalyptic number.

142561215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

142561215 is a deficient number, since it is larger than the sum of its proper divisors (116132913).

142561215 is an equidigital number, since it uses as much as digits as its factorization.

142561215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4341 (or 4332 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 142561215 is about 11939.9001252104. The cubic root of 142561215 is about 522.3967455436.

The spelling of 142561215 in words is "one hundred forty-two million, five hundred sixty-one thousand, two hundred fifteen".