1220403434 has 4 divisors (see below), whose sum is σ = 1830605154. Its totient is φ = 610201716.

The previous prime is 1220403427. The next prime is 1220403479. The reversal of 1220403434 is 4343040221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4343040221 = 13 ⋅334080017.

It can be written as a sum of positive squares in only one way, i.e., 920940409 + 299463025 = 30347^2 + 17305^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305100857 + ... + 305100860.

Almost surely, 2^1220403434 is an apocalyptic number.

1220403434 is a deficient number, since it is larger than the sum of its proper divisors (610201720).

1220403434 is an equidigital number, since it uses as much as digits as its factorization.

1220403434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610201719.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 1220403434 is about 34934.2730566989. The cubic root of 1220403434 is about 1068.6474989234.

Adding to 1220403434 its reverse (4343040221), we get a palindrome (5563443655).

The spelling of 1220403434 in words is "one billion, two hundred twenty million, four hundred three thousand, four hundred thirty-four".