1220025 has 12 divisors (see below), whose sum is σ = 2017232. Its totient is φ = 650640.

The previous prime is 1219991. The next prime is 1220027. The reversal of 1220025 is 5200221.

It is not a de Polignac number, because 1220025 - 2⁶ = 1219961 is a prime.

It is a super-2 number, since 2×1220025² = 2976922001250, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220027) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8059 + ... + 8208.

2^1220025 is an apocalyptic number.

1220025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1220025 is a deficient number, since it is larger than the sum of its proper divisors (797207).

1220025 is a wasteful number, since it uses less digits than its factorization.

1220025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16280 (or 16275 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 1220025 is about 1104.5474186290. The cubic root of 1220025 is about 106.8537028799.

Adding to 1220025 its reverse (5200221), we get a palindrome (6420246).

The spelling of 1220025 in words is "one million, two hundred twenty thousand, twenty-five".