1225156621425 has 24 divisors (see below), whose sum is σ = 2209737035040. Its totient is φ = 594015331200.

The previous prime is 1225156621399. The next prime is 1225156621483. The reversal of 1225156621425 is 5241266515221.

It is not a de Polignac number, because 1225156621425 - 2⁶ = 1225156621361 is a prime.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 742518340 + ... + 742519989.

It is an arithmetic number, because the mean of its divisors is an integer number (92072376460).

Almost surely, 2^{1225156621425} is an apocalyptic number.

1225156621425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1225156621425 is a deficient number, since it is larger than the sum of its proper divisors (984580413615).

1225156621425 is a wasteful number, since it uses less digits than its factorization.

1225156621425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1485038353 (or 1485038348 counting only the distinct ones).

The product of its digits is 288000, while the sum is 42.

The spelling of 1225156621425 in words is "one trillion, two hundred twenty-five billion, one hundred fifty-six million, six hundred twenty-one thousand, four hundred twenty-five".