1520922001 has 9 divisors (see below), whose sum is σ = 1549481403. Its totient is φ = 1492881720.

The previous prime is 1520921993. The next prime is 1520922041. The reversal of 1520922001 is 1002290251.

The square root of 1520922001 is 38999.

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., 1207632001 + 313290000 = 34751^2 + 17700^2 .

It is not a de Polignac number, because 1520922001 - 2³ = 1520921993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1520922041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2300611 + ... + 2301271.

Almost surely, 2^1520922001 is an apocalyptic number.

1520922001 is the 38999-th square number.

1520922001 is the 19500-th centered octagonal number.

It is an amenable number.

1520922001 is a deficient number, since it is larger than the sum of its proper divisors (28559402).

1520922001 is an frugal number, since it uses more digits than its factorization.

1520922001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1440 (or 720 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 22.

The cubic root of 1520922001 is about 1150.0118463808.

It can be divided in two parts, 1520 and 922001, that added together give a 4-th power (923521 = 31⁴).

The spelling of 1520922001 in words is "one billion, five hundred twenty million, nine hundred twenty-two thousand, one".