1221464534 has 4 divisors (see below), whose sum is σ = 1832196804. Its totient is φ = 610732266.

The previous prime is 1221464513. The next prime is 1221464581. The reversal of 1221464534 is 4354641221.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1221464534.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305366132 + ... + 305366135.

It is an arithmetic number, because the mean of its divisors is an integer number (458049201).

Almost surely, 2^1221464534 is an apocalyptic number.

1221464534 is a deficient number, since it is larger than the sum of its proper divisors (610732270).

1221464534 is an equidigital number, since it uses as much as digits as its factorization.

1221464534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610732269.

The product of its digits is 23040, while the sum is 32.

The square root of 1221464534 is about 34949.4568484261. The cubic root of 1221464534 is about 1068.9571269657.

The spelling of 1221464534 in words is "one billion, two hundred twenty-one million, four hundred sixty-four thousand, five hundred thirty-four".