420521274 has 32 divisors (see below), whose sum is σ = 935202240. Its totient is φ = 140067216.

The previous prime is 420521273. The next prime is 420521327. The reversal of 420521274 is 472125024.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (420521273) 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, 104569 + ... + 108515.

It is an arithmetic number, because the mean of its divisors is an integer number (29225070).

Almost surely, 2^420521274 is an apocalyptic number.

420521274 is an abundant number, since it is smaller than the sum of its proper divisors (514680966).

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

420521274 is a wasteful number, since it uses less digits than its factorization.

420521274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5931 (or 5925 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 27.

The square root of 420521274 is about 20506.6153716307. The cubic root of 420521274 is about 749.1969324169.

Adding to 420521274 its reverse (472125024), we get a palindrome (892646298).

The spelling of 420521274 in words is "four hundred twenty million, five hundred twenty-one thousand, two hundred seventy-four".