1521864545 has 8 divisors (see below), whose sum is σ = 1826749824. Its totient is φ = 1217150064.

The previous prime is 1521864521. The next prime is 1521864551. The reversal of 1521864545 is 5454681251.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1521864545 - 2¹² = 1521860449 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22199 + ... + 59468.

It is an arithmetic number, because the mean of its divisors is an integer number (228343728).

Almost surely, 2^1521864545 is an apocalyptic number.

It is an amenable number.

1521864545 is a deficient number, since it is larger than the sum of its proper divisors (304885279).

1521864545 is an equidigital number, since it uses as much as digits as its factorization.

1521864545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85399.

The product of its digits is 192000, while the sum is 41.

The square root of 1521864545 is about 39011.0823356646. The cubic root of 1521864545 is about 1150.2493586552.

The spelling of 1521864545 in words is "one billion, five hundred twenty-one million, eight hundred sixty-four thousand, five hundred forty-five".