1523420647 has 16 divisors (see below), whose sum is σ = 1789990912. Its totient is φ = 1269159840.

The previous prime is 1523420623. The next prime is 1523420653. The reversal of 1523420647 is 7460243251.

It is a cyclic number.

It is not a de Polignac number, because 1523420647 - 2⁷ = 1523420519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1523420047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 300778 + ... + 305800.

It is an arithmetic number, because the mean of its divisors is an integer number (111874432).

Almost surely, 2^1523420647 is an apocalyptic number.

1523420647 is a deficient number, since it is larger than the sum of its proper divisors (266570265).

1523420647 is a wasteful number, since it uses less digits than its factorization.

1523420647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6238.

The product of its (nonzero) digits is 40320, while the sum is 34.

The square root of 1523420647 is about 39031.0215982108. The cubic root of 1523420647 is about 1150.6412673004.

Adding to 1523420647 its reverse (7460243251), we get a palindrome (8983663898).

The spelling of 1523420647 in words is "one billion, five hundred twenty-three million, four hundred twenty thousand, six hundred forty-seven".