142405452 has 120 divisors (see below), whose sum is σ = 437214624. Its totient is φ = 39564288.

The previous prime is 142405427. The next prime is 142405463. The reversal of 142405452 is 254504241.

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

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 83068 + ... + 84764.

Almost surely, 2^142405452 is an apocalyptic number.

142405452 is a gapful number since it is divisible by the number (12) 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 142405452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (218607312).

142405452 is an abundant number, since it is smaller than the sum of its proper divisors (294809172).

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

142405452 is a wasteful number, since it uses less digits than its factorization.

142405452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1757 (or 1746 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

The square root of 142405452 is about 11933.3755492736. The cubic root of 142405452 is about 522.2064185617.

Adding to 142405452 its reverse (254504241), we get a palindrome (396909693).

The spelling of 142405452 in words is "one hundred forty-two million, four hundred five thousand, four hundred fifty-two".