1211347064 has 8 divisors (see below), whose sum is σ = 2271275760. Its totient is φ = 605673528.

The previous prime is 1211347037. The next prime is 1211347079. The reversal of 1211347064 is 4607431121.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×1211347064² = 2934723418922840192, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 75709184 + ... + 75709199.

It is an arithmetic number, because the mean of its divisors is an integer number (283909470).

Almost surely, 2^1211347064 is an apocalyptic number.

It is an amenable number.

1211347064 is a deficient number, since it is larger than the sum of its proper divisors (1059928696).

1211347064 is a wasteful number, since it uses less digits than its factorization.

1211347064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151418389 (or 151418385 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 1211347064 is about 34804.4115594561. The cubic root of 1211347064 is about 1065.9975265910.

Adding to 1211347064 its reverse (4607431121), we get a palindrome (5818778185).

The spelling of 1211347064 in words is "one billion, two hundred eleven million, three hundred forty-seven thousand, sixty-four".