474721421 has 2 divisors, whose sum is σ = 474721422. Its totient is φ = 474721420.

The previous prime is 474721417. The next prime is 474721427. The reversal of 474721421 is 124127474.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 469198921 + 5522500 = 21661^2 + 2350^2 .

It is a cyclic number.

It is not a de Polignac number, because 474721421 - 2² = 474721417 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (474721427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 237360710 + 237360711.

It is an arithmetic number, because the mean of its divisors is an integer number (237360711).

Almost surely, 2^474721421 is an apocalyptic number.

It is an amenable number.

474721421 is a deficient number, since it is larger than the sum of its proper divisors (1).

474721421 is an equidigital number, since it uses as much as digits as its factorization.

474721421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12544, while the sum is 32.

The square root of 474721421 is about 21788.1027397982. The cubic root of 474721421 is about 780.0928122081.

Adding to 474721421 its reverse (124127474), we get a palindrome (598848895).

The spelling of 474721421 in words is "four hundred seventy-four million, seven hundred twenty-one thousand, four hundred twenty-one".