1220025225 has 24 divisors (see below), whose sum is σ = 2104811712. Its totient is φ = 622388800.

The previous prime is 1220025223. The next prime is 1220025227. The reversal of 1220025225 is 5225200221.

It is an interprime number because it is at equal distance from previous prime (1220025223) and next prime (1220025227).

It is not a de Polignac number, because 1220025225 - 2¹ = 1220025223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1220025223) 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 23 ways as a sum of consecutive naturals, for example, 351906 + ... + 355355.

It is an arithmetic number, because the mean of its divisors is an integer number (87700488).

Almost surely, 2^1220025225 is an apocalyptic number.

1220025225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1220025225 is a deficient number, since it is larger than the sum of its proper divisors (884786487).

1220025225 is a wasteful number, since it uses less digits than its factorization.

1220025225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707297 (or 707292 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 1220025225 is about 34928.8594861040. The cubic root of 1220025225 is about 1068.5370944868.

Adding to 1220025225 its reverse (5225200221), we get a palindrome (6445225446).

The spelling of 1220025225 in words is "one billion, two hundred twenty million, twenty-five thousand, two hundred twenty-five".