340145421 has 16 divisors (see below), whose sum is σ = 565436928. Its totient is φ = 176698800.

The previous prime is 340145419. The next prime is 340145431. The reversal of 340145421 is 124541043.

It is not a de Polignac number, because 340145421 - 2¹ = 340145419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 340145391 and 340145400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340145431) 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, 736015 + ... + 736476.

It is an arithmetic number, because the mean of its divisors is an integer number (35339808).

Almost surely, 2^340145421 is an apocalyptic number.

It is an amenable number.

340145421 is a deficient number, since it is larger than the sum of its proper divisors (225291507).

340145421 is a wasteful number, since it uses less digits than its factorization.

340145421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1472512.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 340145421 is about 18443.0317735453. The cubic root of 340145421 is about 698.0526974223.

Adding to 340145421 its reverse (124541043), we get a palindrome (464686464).

The spelling of 340145421 in words is "three hundred forty million, one hundred forty-five thousand, four hundred twenty-one".