1525821049 has 8 divisors (see below), whose sum is σ = 1607724000. Its totient is φ = 1444077792.

The previous prime is 1525821041. The next prime is 1525821067. The reversal of 1525821049 is 9401285251.

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 1525821049 - 2³ = 1525821041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1525820999 and 1525821017.

It is not an unprimeable number, because it can be changed into a prime (1525821041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20044 + ... + 58765.

It is an arithmetic number, because the mean of its divisors is an integer number (200965500).

Almost surely, 2^1525821049 is an apocalyptic number.

1525821049 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1525821049 is a deficient number, since it is larger than the sum of its proper divisors (81902951).

1525821049 is a wasteful number, since it uses less digits than its factorization.

1525821049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79847.

The product of its (nonzero) digits is 28800, while the sum is 37.

The square root of 1525821049 is about 39061.7594201797. The cubic root of 1525821049 is about 1151.2452922424.

The spelling of 1525821049 in words is "one billion, five hundred twenty-five million, eight hundred twenty-one thousand, forty-nine".