1521450149 has 4 divisors (see below), whose sum is σ = 1523476800. Its totient is φ = 1519423500.

The previous prime is 1521450127. The next prime is 1521450191. The reversal of 1521450149 is 9410541251.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9410541251 = 313 ⋅30065627.

It is a cyclic number.

It is not a de Polignac number, because 1521450149 - 2²⁰ = 1520401573 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 (1521450949) 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 3 ways as a sum of consecutive naturals, for example, 1012199 + ... + 1013700.

It is an arithmetic number, because the mean of its divisors is an integer number (380869200).

Almost surely, 2^1521450149 is an apocalyptic number.

It is an amenable number.

1521450149 is a deficient number, since it is larger than the sum of its proper divisors (2026651).

1521450149 is an equidigital number, since it uses as much as digits as its factorization.

1521450149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2026650.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 1521450149 is about 39005.7707140879. The cubic root of 1521450149 is about 1150.1449468214.

The spelling of 1521450149 in words is "one billion, five hundred twenty-one million, four hundred fifty thousand, one hundred forty-nine".