1625121057 has 16 divisors (see below), whose sum is σ = 2479122432. Its totient is φ = 927610320.

The previous prime is 1625121037. The next prime is 1625121107. The reversal of 1625121057 is 7501215261.

It is not a de Polignac number, because 1625121057 - 2¹⁰ = 1625120033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1625121037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23343 + ... + 61604.

It is an arithmetic number, because the mean of its divisors is an integer number (154945152).

Almost surely, 2^1625121057 is an apocalyptic number.

It is an amenable number.

1625121057 is a deficient number, since it is larger than the sum of its proper divisors (854001375).

1625121057 is an equidigital number, since it uses as much as digits as its factorization.

1625121057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85868.

The product of its (nonzero) digits is 4200, while the sum is 30.

The square root of 1625121057 is about 40312.7902408156. The cubic root of 1625121057 is about 1175.6965375481.

The spelling of 1625121057 in words is "one billion, six hundred twenty-five million, one hundred twenty-one thousand, fifty-seven".