1220454995 has 24 divisors (see below), whose sum is σ = 1554003360. Its totient is φ = 919573760.

The previous prime is 1220454979. The next prime is 1220455021. The reversal of 1220454995 is 5994540221.

It is not a de Polignac number, because 1220454995 - 2⁴ = 1220454979 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 168866 + ... + 175944.

It is an arithmetic number, because the mean of its divisors is an integer number (64750140).

Almost surely, 2^1220454995 is an apocalyptic number.

1220454995 is a deficient number, since it is larger than the sum of its proper divisors (333548365).

1220454995 is an equidigital number, since it uses as much as digits as its factorization.

1220454995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7183 (or 7154 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 41.

The square root of 1220454995 is about 34935.0110204648. The cubic root of 1220454995 is about 1068.6625485253.

The spelling of 1220454995 in words is "one billion, two hundred twenty million, four hundred fifty-four thousand, nine hundred ninety-five".