1220376407 has 4 divisors (see below), whose sum is σ = 1224782376. Its totient is φ = 1215970440.

The previous prime is 1220376397. The next prime is 1220376457. The reversal of 1220376407 is 7046730221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7046730221 = 43 ⋅163877447.

It is a cyclic number.

It is not a de Polignac number, because 1220376407 - 2⁸ = 1220376151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220376457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2202569 + ... + 2203122.

It is an arithmetic number, because the mean of its divisors is an integer number (306195594).

Almost surely, 2^1220376407 is an apocalyptic number.

1220376407 is a deficient number, since it is larger than the sum of its proper divisors (4405969).

1220376407 is an equidigital number, since it uses as much as digits as its factorization.

1220376407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4405968.

The product of its (nonzero) digits is 14112, while the sum is 32.

The square root of 1220376407 is about 34933.8862281310. The cubic root of 1220376407 is about 1068.6396101252.

The spelling of 1220376407 in words is "one billion, two hundred twenty million, three hundred seventy-six thousand, four hundred seven".