421401502 has 16 divisors (see below), whose sum is σ = 640468800. Its totient is φ = 207930528.

The previous prime is 421401499. The next prime is 421401509. The reversal of 421401502 is 205104124.

It is a self number, because there is not a number n which added to its sum of digits gives 421401502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421401509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42283 + ... + 51289.

It is an arithmetic number, because the mean of its divisors is an integer number (40029300).

Almost surely, 2^421401502 is an apocalyptic number.

421401502 is a deficient number, since it is larger than the sum of its proper divisors (219067298).

421401502 is a wasteful number, since it uses less digits than its factorization.

421401502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9315.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 421401502 is about 20528.0662021536. The cubic root of 421401502 is about 749.7193035517.

Adding to 421401502 its reverse (205104124), we get a palindrome (626505626).

The spelling of 421401502 in words is "four hundred twenty-one million, four hundred one thousand, five hundred two".