342145421 has 4 divisors (see below), whose sum is σ = 342738972. Its totient is φ = 341551872.

The previous prime is 342145411. The next prime is 342145429. The reversal of 342145421 is 124541243.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124541243 = 5653 ⋅22031.

It can be written as a sum of positive squares in 2 ways, for example, as 158407396 + 183738025 = 12586^2 + 13555^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-342145421 is a prime.

It is a super-2 number, since 2×342145421² = 234126978222534482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (342145429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 295910 + ... + 297063.

It is an arithmetic number, because the mean of its divisors is an integer number (85684743).

Almost surely, 2^342145421 is an apocalyptic number.

It is an amenable number.

342145421 is a deficient number, since it is larger than the sum of its proper divisors (593551).

342145421 is an equidigital number, since it uses as much as digits as its factorization.

342145421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593550.

The product of its digits is 3840, while the sum is 26.

The square root of 342145421 is about 18497.1733245921. The cubic root of 342145421 is about 699.4181702671.

Adding to 342145421 its reverse (124541243), we get a palindrome (466686664).

The spelling of 342145421 in words is "three hundred forty-two million, one hundred forty-five thousand, four hundred twenty-one".