1620525012 has 12 divisors (see below), whose sum is σ = 3781225056. Its totient is φ = 540175000.

The previous prime is 1620524999. The next prime is 1620525013. The reversal of 1620525012 is 2105250261.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×1620525012² = 5252202629035200288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620525013) 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 3 ways as a sum of consecutive naturals, for example, 67521864 + ... + 67521887.

It is an arithmetic number, because the mean of its divisors is an integer number (315102088).

Almost surely, 2^1620525012 is an apocalyptic number.

1620525012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1620525012 is an abundant number, since it is smaller than the sum of its proper divisors (2160700044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1620525012 is a wasteful number, since it uses less digits than its factorization.

1620525012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135043758 (or 135043756 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 1620525012 is about 40255.7450806714. The cubic root of 1620525012 is about 1174.5871522578.

Adding to 1620525012 its reverse (2105250261), we get a palindrome (3725775273).

The spelling of 1620525012 in words is "one billion, six hundred twenty million, five hundred twenty-five thousand, twelve".