1625421433 has 16 divisors (see below), whose sum is σ = 1702549264. Its totient is φ = 1550223360.

The previous prime is 1625421401. The next prime is 1625421439. The reversal of 1625421433 is 3341245261.

It can be written as a sum of positive squares in 8 ways, for example, as 346071609 + 1279349824 = 18603^2 + 35768^2 .

It is a cyclic number.

It is not a de Polignac number, because 1625421433 - 2⁵ = 1625421401 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1625421395 and 1625421404.

It is not an unprimeable number, because it can be changed into a prime (1625421439) 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 15 ways as a sum of consecutive naturals, for example, 759541 + ... + 761677.

It is an arithmetic number, because the mean of its divisors is an integer number (106409329).

Almost surely, 2^1625421433 is an apocalyptic number.

It is an amenable number.

1625421433 is a deficient number, since it is larger than the sum of its proper divisors (77127831).

1625421433 is a wasteful number, since it uses less digits than its factorization.

1625421433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2572.

The product of its digits is 17280, while the sum is 31.

The square root of 1625421433 is about 40316.5156356548. The cubic root of 1625421433 is about 1175.7689689250.

Adding to 1625421433 its reverse (3341245261), we get a palindrome (4966666694).

The spelling of 1625421433 in words is "one billion, six hundred twenty-five million, four hundred twenty-one thousand, four hundred thirty-three".