1601521007 has 2 divisors, whose sum is σ = 1601521008. Its totient is φ = 1601521006.

The previous prime is 1601520983. The next prime is 1601521021. The reversal of 1601521007 is 7001251061.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1601521007 - 2¹⁸ = 1601258863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1601521037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 800760503 + 800760504.

It is an arithmetic number, because the mean of its divisors is an integer number (800760504).

Almost surely, 2^1601521007 is an apocalyptic number.

1601521007 is a deficient number, since it is larger than the sum of its proper divisors (1).

1601521007 is an equidigital number, since it uses as much as digits as its factorization.

1601521007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 420, while the sum is 23.

The square root of 1601521007 is about 40019.0080711654. The cubic root of 1601521007 is about 1169.9775988601.

Adding to 1601521007 its reverse (7001251061), we get a palindrome (8602772068).

The spelling of 1601521007 in words is "one billion, six hundred one million, five hundred twenty-one thousand, seven".