1211485460 has 12 divisors (see below), whose sum is σ = 2544119508. Its totient is φ = 484594176.

The previous prime is 1211485459. The next prime is 1211485481. The reversal of 1211485460 is 645841121.

1211485460 = T₂₂₀₁₁ + T₂₂₀₁₂ + ... + T₂₂₀₁₅.

It can be written as a sum of positive squares in 2 ways, for example, as 223263364 + 988222096 = 14942^2 + 31436^2 .

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 in 3 ways as a sum of consecutive naturals, for example, 30287117 + ... + 30287156.

It is an arithmetic number, because the mean of its divisors is an integer number (212009959).

Almost surely, 2^1211485460 is an apocalyptic number.

1211485460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211485460 is an abundant number, since it is smaller than the sum of its proper divisors (1332634048).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1211485460 is a wasteful number, since it uses less digits than its factorization.

1211485460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60574282 (or 60574280 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 1211485460 is about 34806.3996989059. The cubic root of 1211485460 is about 1066.0381216662.

The spelling of 1211485460 in words is "one billion, two hundred eleven million, four hundred eighty-five thousand, four hundred sixty".