425943721 has 12 divisors (see below), whose sum is σ = 524632788. Its totient is φ = 343617792.

The previous prime is 425943599. The next prime is 425943733. The reversal of 425943721 is 127349524.

It can be written as a sum of positive squares in 2 ways, for example, as 326163600 + 99780121 = 18060^2 + 9989^2 .

It is not a de Polignac number, because 425943721 - 2¹¹ = 425941673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (425943761) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 254836 + ... + 256501.

It is an arithmetic number, because the mean of its divisors is an integer number (43719399).

Almost surely, 2^425943721 is an apocalyptic number.

It is an amenable number.

425943721 is a deficient number, since it is larger than the sum of its proper divisors (98689067).

425943721 is a wasteful number, since it uses less digits than its factorization.

425943721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511368 (or 511361 counting only the distinct ones).

The product of its digits is 60480, while the sum is 37.

The square root of 425943721 is about 20638.4040322889. The cubic root of 425943721 is about 752.4033840262.

The spelling of 425943721 in words is "four hundred twenty-five million, nine hundred forty-three thousand, seven hundred twenty-one".