1261331442234 has 40 divisors (see below), whose sum is σ = 2826695171520. Its totient is φ = 420387520104.

The previous prime is 1261331442199. The next prime is 1261331442253. The reversal of 1261331442234 is 4322441331621.

1261331442234 is a `hidden beast` number, since 1 + 2 + 61 + 331 + 44 + 223 + 4 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 701247 + ... + 1736205.

It is an arithmetic number, because the mean of its divisors is an integer number (70667379288).

Almost surely, 2^{1261331442234} is an apocalyptic number.

1261331442234 is an abundant number, since it is smaller than the sum of its proper divisors (1565363729286).

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

1261331442234 is a wasteful number, since it uses less digits than its factorization.

1261331442234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1042496 (or 1042487 counting only the distinct ones).

The product of its digits is 82944, while the sum is 36.

Adding to 1261331442234 its reverse (4322441331621), we get a palindrome (5583772773855).

The spelling of 1261331442234 in words is "one trillion, two hundred sixty-one billion, three hundred thirty-one million, four hundred forty-two thousand, two hundred thirty-four".