420261 has 16 divisors (see below), whose sum is σ = 603840. Its totient is φ = 259200.

The previous prime is 420253. The next prime is 420263. The reversal of 420261 is 162024.

It is not a de Polignac number, because 420261 - 2³ = 420253 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 420261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420263) 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, 4111 + ... + 4211.

It is an arithmetic number, because the mean of its divisors is an integer number (37740).

2⁴²⁰²⁶¹ is an apocalyptic number.

It is an amenable number.

420261 is a deficient number, since it is larger than the sum of its proper divisors (183579).

420261 is a wasteful number, since it uses less digits than its factorization.

420261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 420261 is about 648.2754044386. The cubic root of 420261 is about 74.9042333242.

Adding to 420261 its reverse (162024), we get a palindrome (582285).

The spelling of 420261 in words is "four hundred twenty thousand, two hundred sixty-one".