1427721016 has 16 divisors (see below), whose sum is σ = 2684276640. Its totient is φ = 711913920.

The previous prime is 1427720993. The next prime is 1427721019. The reversal of 1427721016 is 6101277241.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1427721019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 240205 + ... + 246076.

It is an arithmetic number, because the mean of its divisors is an integer number (167767290).

Almost surely, 2^1427721016 is an apocalyptic number.

It is an amenable number.

1427721016 is a deficient number, since it is larger than the sum of its proper divisors (1256555624).

1427721016 is a wasteful number, since it uses less digits than its factorization.

1427721016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486654 (or 486650 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 1427721016 is about 37785.1957253102. The cubic root of 1427721016 is about 1126.0243551673.

Adding to 1427721016 its reverse (6101277241), we get a palindrome (7528998257).

The spelling of 1427721016 in words is "one billion, four hundred twenty-seven million, seven hundred twenty-one thousand, sixteen".