1321761954 has 8 divisors (see below), whose sum is σ = 2643523920. Its totient is φ = 440587316.

The previous prime is 1321761949. The next prime is 1321761967. The reversal of 1321761954 is 4591671231.

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

1321761954 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110146824 + ... + 110146835.

It is an arithmetic number, because the mean of its divisors is an integer number (330440490).

Almost surely, 2^1321761954 is an apocalyptic number.

1321761954 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1321761954 is a wasteful number, since it uses less digits than its factorization.

1321761954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220293664.

The product of its digits is 45360, while the sum is 39.

The square root of 1321761954 is about 36356.0442567670. The cubic root of 1321761954 is about 1097.4491731209.

The spelling of 1321761954 in words is "one billion, three hundred twenty-one million, seven hundred sixty-one thousand, nine hundred fifty-four".