142275440 has 20 divisors (see below), whose sum is σ = 330790584. Its totient is φ = 56910144.

The previous prime is 142275407. The next prime is 142275443. The reversal of 142275440 is 44572241.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142275443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 889142 + ... + 889301.

Almost surely, 2^142275440 is an apocalyptic number.

142275440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142275440 is an abundant number, since it is smaller than the sum of its proper divisors (188515144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

142275440 is a wasteful number, since it uses less digits than its factorization.

142275440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1778456 (or 1778450 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 29.

The square root of 142275440 is about 11927.9268944775. The cubic root of 142275440 is about 522.0474504607.

The spelling of 142275440 in words is "one hundred forty-two million, two hundred seventy-five thousand, four hundred forty".