142694838 has 128 divisors (see below), whose sum is σ = 394813440. Its totient is φ = 37532160.

The previous prime is 142694837. The next prime is 142694873. The reversal of 142694838 is 838496241.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 142694793 and 142694802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142694831) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 130731 + ... + 131817.

It is an arithmetic number, because the mean of its divisors is an integer number (3084480).

Almost surely, 2^142694838 is an apocalyptic number.

142694838 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 142694838, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (197406720).

142694838 is an abundant number, since it is smaller than the sum of its proper divisors (252118602).

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

142694838 is a wasteful number, since it uses less digits than its factorization.

142694838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1139 (or 1133 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 142694838 is about 11945.4944644414. The cubic root of 142694838 is about 522.5599091887.

The spelling of 142694838 in words is "one hundred forty-two million, six hundred ninety-four thousand, eight hundred thirty-eight".