1221064574 has 8 divisors (see below), whose sum is σ = 1835113968. Its totient is φ = 609359920.

The previous prime is 1221064571. The next prime is 1221064613. The reversal of 1221064574 is 4754601221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1221064574.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221064571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 584882 + ... + 586965.

It is an arithmetic number, because the mean of its divisors is an integer number (229389246).

Almost surely, 2^1221064574 is an apocalyptic number.

1221064574 is a deficient number, since it is larger than the sum of its proper divisors (614049394).

1221064574 is a wasteful number, since it uses less digits than its factorization.

1221064574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1172370.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 1221064574 is about 34943.7344026079. The cubic root of 1221064574 is about 1068.8404400558.

Adding to 1221064574 its reverse (4754601221), we get a palindrome (5975665795).

The spelling of 1221064574 in words is "one billion, two hundred twenty-one million, sixty-four thousand, five hundred seventy-four".