142391456 has 72 divisors (see below), whose sum is σ = 302880060. Its totient is φ = 65871872.

The previous prime is 142391419. The next prime is 142391467. The reversal of 142391456 is 654193241.

It can be written as a sum of positive squares in 6 ways, for example, as 119159056 + 23232400 = 10916^2 + 4820^2 .

It is a plaindrome in base 13.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 822986 + ... + 823158.

Almost surely, 2^142391456 is an apocalyptic number.

142391456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 142391456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151440030).

142391456 is an abundant number, since it is smaller than the sum of its proper divisors (160488604).

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

142391456 is a wasteful number, since it uses less digits than its factorization.

142391456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306 (or 281 counting only the distinct ones).

The product of its digits is 25920, while the sum is 35.

The square root of 142391456 is about 11932.7891123576. The cubic root of 142391456 is about 522.1893100396.

The spelling of 142391456 in words is "one hundred forty-two million, three hundred ninety-one thousand, four hundred fifty-six".