1521546049 has 9 divisors (see below), whose sum is σ = 1606624803. Its totient is φ = 1440762552.

The previous prime is 1521546043. The next prime is 1521546067. The reversal of 1521546049 is 9406451251.

1521546049 = T₃₇ + T₃₈ + ... + T₂₀₈₉.

The square root of 1521546049 is 39007.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 785400625 + 736145424 = 28025^2 + 27132^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1521546049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1521545999 and 1521546017.

It is not an unprimeable number, because it can be changed into a prime (1521546043) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 740107 + ... + 742159.

It is an arithmetic number, because the mean of its divisors is an integer number (178513867).

Almost surely, 2^1521546049 is an apocalyptic number.

1521546049 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1521546049 is the 39007-th square number.

1521546049 is the 19504-th centered octagonal number.

It is an amenable number.

1521546049 is a deficient number, since it is larger than the sum of its proper divisors (85078754).

1521546049 is an frugal number, since it uses more digits than its factorization.

1521546049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4144 (or 2072 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 37.

The cubic root of 1521546049 is about 1150.1691116142.

It can be divided in two parts, 152154 and 6049, that added together give a triangular number (158203 = T₅₆₂).

The spelling of 1521546049 in words is "one billion, five hundred twenty-one million, five hundred forty-six thousand, forty-nine".