420135461 has 2 divisors, whose sum is σ = 420135462. Its totient is φ = 420135460.

The previous prime is 420135451. The next prime is 420135473. The reversal of 420135461 is 164531024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 292581025 + 127554436 = 17105^2 + 11294^2 .

It is a cyclic number.

It is not a de Polignac number, because 420135461 - 2¹⁸ = 419873317 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 420135461.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420135451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210067730 + 210067731.

It is an arithmetic number, because the mean of its divisors is an integer number (210067731).

Almost surely, 2^420135461 is an apocalyptic number.

It is an amenable number.

420135461 is a deficient number, since it is larger than the sum of its proper divisors (1).

420135461 is an equidigital number, since it uses as much as digits as its factorization.

420135461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 420135461 is about 20497.2061754767. The cubic root of 420135461 is about 748.9677419837.

Adding to 420135461 its reverse (164531024), we get a palindrome (584666485).

It can be divided in two parts, 42013 and 5461, that added together give a palindrome (47474).

The spelling of 420135461 in words is "four hundred twenty million, one hundred thirty-five thousand, four hundred sixty-one".