1261125167071 has 8 divisors (see below), whose sum is σ = 1572311896704. Its totient is φ = 982694935320.

The previous prime is 1261125167063. The next prime is 1261125167077. The reversal of 1261125167071 is 1707615211621.

It is a happy number.

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

It is not a de Polignac number, because 1261125167071 - 2³ = 1261125167063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1261125167077) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8189124385 + ... + 8189124538.

It is an arithmetic number, because the mean of its divisors is an integer number (196538987088).

Almost surely, 2^{1261125167071} is an apocalyptic number.

1261125167071 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1261125167071 is a deficient number, since it is larger than the sum of its proper divisors (311186729633).

1261125167071 is a wasteful number, since it uses less digits than its factorization.

1261125167071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16378248941.

The product of its (nonzero) digits is 35280, while the sum is 40.

The spelling of 1261125167071 in words is "one trillion, two hundred sixty-one billion, one hundred twenty-five million, one hundred sixty-seven thousand, seventy-one".