1521074481 has 4 divisors (see below), whose sum is σ = 2028099312. Its totient is φ = 1014049652.

The previous prime is 1521074461. The next prime is 1521074483. The reversal of 1521074481 is 1844701251.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1521074481 - 2⁵ = 1521074449 is a prime.

It is a super-2 number, since 2×1521074481² = 4627335153498838722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1521074483) 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, 253512411 + ... + 253512416.

It is an arithmetic number, because the mean of its divisors is an integer number (507024828).

Almost surely, 2^1521074481 is an apocalyptic number.

It is an amenable number.

1521074481 is a deficient number, since it is larger than the sum of its proper divisors (507024831).

1521074481 is an equidigital number, since it uses as much as digits as its factorization.

1521074481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507024830.

The product of its (nonzero) digits is 8960, while the sum is 33.

The square root of 1521074481 is about 39000.9548729259. The cubic root of 1521074481 is about 1150.0502765669.

The spelling of 1521074481 in words is "one billion, five hundred twenty-one million, seventy-four thousand, four hundred eighty-one".