1604261522 has 4 divisors (see below), whose sum is σ = 2406392286. Its totient is φ = 802130760.

The previous prime is 1604261513. The next prime is 1604261537. The reversal of 1604261522 is 2251624061.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1458552481 + 145709041 = 38191^2 + 12071^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 401065379 + ... + 401065382.

Almost surely, 2^1604261522 is an apocalyptic number.

1604261522 is a deficient number, since it is larger than the sum of its proper divisors (802130764).

1604261522 is an equidigital number, since it uses as much as digits as its factorization.

1604261522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802130763.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 1604261522 is about 40053.2336022948. The cubic root of 1604261522 is about 1170.6445719001.

Adding to 1604261522 its reverse (2251624061), we get a palindrome (3855885583).

The spelling of 1604261522 in words is "one billion, six hundred four million, two hundred sixty-one thousand, five hundred twenty-two".