420340134 has 32 divisors (see below), whose sum is σ = 878895360. Its totient is φ = 133767392.

The previous prime is 420340133. The next prime is 420340139. The reversal of 420340134 is 431043024.

It is a super-2 number, since 2×420340134² = 353371656502275912, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 420340134.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420340133) 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, 78412 + ... + 83600.

It is an arithmetic number, because the mean of its divisors is an integer number (27465480).

Almost surely, 2^420340134 is an apocalyptic number.

420340134 is an abundant number, since it is smaller than the sum of its proper divisors (458555226).

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

420340134 is a wasteful number, since it uses less digits than its factorization.

420340134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5804.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 420340134 is about 20502.1982723805. The cubic root of 420340134 is about 749.0893445007.

Adding to 420340134 its reverse (431043024), we get a palindrome (851383158).

The spelling of 420340134 in words is "four hundred twenty million, three hundred forty thousand, one hundred thirty-four".