1220894902 has 4 divisors (see below), whose sum is σ = 1831342356. Its totient is φ = 610447450.

The previous prime is 1220894893. The next prime is 1220894903. The reversal of 1220894902 is 2094980221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2094980221 = 10601 ⋅197621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220894903) 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 as a sum of consecutive naturals, namely, 305223724 + ... + 305223727.

It is an arithmetic number, because the mean of its divisors is an integer number (457835589).

Almost surely, 2^1220894902 is an apocalyptic number.

1220894902 is a deficient number, since it is larger than the sum of its proper divisors (610447454).

1220894902 is an equidigital number, since it uses as much as digits as its factorization.

1220894902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610447453.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 1220894902 is about 34941.3065296649. The cubic root of 1220894902 is about 1068.7909311547.

The spelling of 1220894902 in words is "one billion, two hundred twenty million, eight hundred ninety-four thousand, nine hundred two".