1225005501 has 16 divisors (see below), whose sum is σ = 1697068800. Its totient is φ = 785053248.

The previous prime is 1225005493. The next prime is 1225005527. The reversal of 1225005501 is 1055005221.

It is not a de Polignac number, because 1225005501 - 2³ = 1225005493 is a prime.

It is a super-2 number, since 2×1225005501² = 3001276954960522002, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225005581) 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, 10821 + ... + 50666.

It is an arithmetic number, because the mean of its divisors is an integer number (106066800).

Almost surely, 2^1225005501 is an apocalyptic number.

It is an amenable number.

1225005501 is a deficient number, since it is larger than the sum of its proper divisors (472063299).

1225005501 is a wasteful number, since it uses less digits than its factorization.

1225005501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61748.

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 1225005501 is about 35000.0785856261. The cubic root of 1225005501 is about 1069.9890821956.

The spelling of 1225005501 in words is "one billion, two hundred twenty-five million, five thousand, five hundred one".