142345021420 has 96 divisors (see below), whose sum is σ = 345237580800. Its totient is φ = 48291012864.

The previous prime is 142345021409. The next prime is 142345021457. The reversal of 142345021420 is 24120543241.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5212161 + ... + 5239399.

It is an arithmetic number, because the mean of its divisors is an integer number (3596224800).

Almost surely, 2^142345021420 is an apocalyptic number.

142345021420 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 142345021420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172618790400).

142345021420 is an abundant number, since it is smaller than the sum of its proper divisors (202892559380).

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

142345021420 is a wasteful number, since it uses less digits than its factorization.

142345021420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27647 (or 27645 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 28.

Adding to 142345021420 its reverse (24120543241), we get a palindrome (166465564661).

The spelling of 142345021420 in words is "one hundred forty-two billion, three hundred forty-five million, twenty-one thousand, four hundred twenty".