1220025197 has 4 divisors (see below), whose sum is σ = 1248397920. Its totient is φ = 1191652476.

The previous prime is 1220025173. The next prime is 1220025199. The reversal of 1220025197 is 7915200221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7915200221 = 17 ⋅465600013.

It is a cyclic number.

It is not a de Polignac number, because 1220025197 - 2²² = 1215830893 is a prime.

It is a super-2 number, since 2×1220025197² = 2976922962629777618, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220025199) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14186297 + ... + 14186382.

It is an arithmetic number, because the mean of its divisors is an integer number (312099480).

Almost surely, 2^1220025197 is an apocalyptic number.

It is an amenable number.

1220025197 is a deficient number, since it is larger than the sum of its proper divisors (28372723).

1220025197 is an equidigital number, since it uses as much as digits as its factorization.

1220025197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28372722.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 1220025197 is about 34928.8590852893. The cubic root of 1220025197 is about 1068.5370863123.

The spelling of 1220025197 in words is "one billion, two hundred twenty million, twenty-five thousand, one hundred ninety-seven".