142213240 has 64 divisors (see below), whose sum is σ = 345915360. Its totient is φ = 52308480.

The previous prime is 142213231. The next prime is 142213241. The reversal of 142213240 is 42312241.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142213241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 255042 + ... + 255598.

Almost surely, 2^142213240 is an apocalyptic number.

142213240 is a gapful number since it is divisible by the number (10) 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 142213240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172957680).

142213240 is an abundant number, since it is smaller than the sum of its proper divisors (203702120).

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

142213240 is a wasteful number, since it uses less digits than its factorization.

142213240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1072 (or 1068 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 142213240 is about 11925.3192829375. The cubic root of 142213240 is about 521.9713631085.

Adding to 142213240 its reverse (42312241), we get a palindrome (184525481).

Subtracting from 142213240 its reverse (42312241), we obtain a palindrome (99900999).

The spelling of 142213240 in words is "one hundred forty-two million, two hundred thirteen thousand, two hundred forty".