1231278670 has 32 divisors (see below), whose sum is σ = 2265408000. Its totient is φ = 481684896.

The previous prime is 1231278649. The next prime is 1231278673. The reversal of 1231278670 is 768721321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231278673) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112167 + ... + 122653.

It is an arithmetic number, because the mean of its divisors is an integer number (70794000).

Almost surely, 2^1231278670 is an apocalyptic number.

1231278670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1231278670 is a deficient number, since it is larger than the sum of its proper divisors (1034129330).

1231278670 is a wasteful number, since it uses less digits than its factorization.

1231278670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10752.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 1231278670 is about 35089.5806472520. The cubic root of 1231278670 is about 1071.8124201891.

Adding to 1231278670 its reverse (768721321), we get a palindrome (1999999991).

The spelling of 1231278670 in words is "one billion, two hundred thirty-one million, two hundred seventy-eight thousand, six hundred seventy".