342121340 has 96 divisors (see below), whose sum is σ = 805049280. Its totient is φ = 121088000.

The previous prime is 342121337. The next prime is 342121357. The reversal of 342121340 is 43121243.

It is a super-2 number, since 2×342121340² = 234094022566791200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

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, 1977494 + ... + 1977666.

It is an arithmetic number, because the mean of its divisors is an integer number (8385930).

Almost surely, 2^342121340 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 342121340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (402524640).

342121340 is an abundant number, since it is smaller than the sum of its proper divisors (462927940).

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

342121340 is a wasteful number, since it uses less digits than its factorization.

342121340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383 (or 381 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 342121340 is about 18496.5223758414. The cubic root of 342121340 is about 699.4017609832.

Adding to 342121340 its reverse (43121243), we get a palindrome (385242583).

The spelling of 342121340 in words is "three hundred forty-two million, one hundred twenty-one thousand, three hundred forty".