1201209478 has 16 divisors (see below), whose sum is σ = 2074938624. Its totient is φ = 510873480.

The previous prime is 1201209473. The next prime is 1201209509. The reversal of 1201209478 is 8749021021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201209473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 325650 + ... + 329317.

It is an arithmetic number, because the mean of its divisors is an integer number (129683664).

Almost surely, 2^1201209478 is an apocalyptic number.

1201209478 is a deficient number, since it is larger than the sum of its proper divisors (873729146).

1201209478 is a wasteful number, since it uses less digits than its factorization.

1201209478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655107.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 1201209478 is about 34658.4690660162. The cubic root of 1201209478 is about 1063.0154665710.

The spelling of 1201209478 in words is "one billion, two hundred one million, two hundred nine thousand, four hundred seventy-eight".