1521481847 has 4 divisors (see below), whose sum is σ = 1562603016. Its totient is φ = 1480360680.

The previous prime is 1521481823. The next prime is 1521481853. The reversal of 1521481847 is 7481841251.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1521481847 - 2⁶ = 1521481783 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 (1521481817) 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, 20560529 + ... + 20560602.

It is an arithmetic number, because the mean of its divisors is an integer number (390650754).

Almost surely, 2^1521481847 is an apocalyptic number.

1521481847 is a deficient number, since it is larger than the sum of its proper divisors (41121169).

1521481847 is an equidigital number, since it uses as much as digits as its factorization.

1521481847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41121168.

The product of its digits is 71680, while the sum is 41.

The square root of 1521481847 is about 39006.1770364644. The cubic root of 1521481847 is about 1150.1529341663.

The spelling of 1521481847 in words is "one billion, five hundred twenty-one million, four hundred eighty-one thousand, eight hundred forty-seven".