142640025 has 48 divisors (see below), whose sum is σ = 263608128. Its totient is φ = 67456000.

The previous prime is 142639969. The next prime is 142640027. The reversal of 142640025 is 520046241.

It is not a de Polignac number, because 142640025 - 2⁶ = 142639961 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 142639977 and 142640004.

It is not an unprimeable number, because it can be changed into a prime (142640027) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 31717 + ... + 35933.

It is an arithmetic number, because the mean of its divisors is an integer number (5491836).

Almost surely, 2^142640025 is an apocalyptic number.

142640025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

142640025 is a deficient number, since it is larger than the sum of its proper divisors (120968103).

142640025 is a wasteful number, since it uses less digits than its factorization.

142640025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4282 (or 4277 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 142640025 is about 11943.1999480876. The cubic root of 142640025 is about 522.4929907563.

Adding to 142640025 its reverse (520046241), we get a palindrome (662686266).

The spelling of 142640025 in words is "one hundred forty-two million, six hundred forty thousand, twenty-five".