1261346871410 has 16 divisors (see below), whose sum is σ = 2270437154136. Its totient is φ = 504535907328.

The previous prime is 1261346871401. The next prime is 1261346871427. The reversal of 1261346871410 is 141786431621.

It is a Cunningham number, because it is equal to 1123097²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 987119744521 + 274227126889 = 993539^2 + 523667^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3367442 + ... + 3723218.

Almost surely, 2^{1261346871410} is an apocalyptic number.

1261346871410 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1261346871410 is a deficient number, since it is larger than the sum of its proper divisors (1009090282726).

1261346871410 is a wasteful number, since it uses less digits than its factorization.

1261346871410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710317.

The product of its (nonzero) digits is 193536, while the sum is 44.

The spelling of 1261346871410 in words is "one trillion, two hundred sixty-one billion, three hundred forty-six million, eight hundred seventy-one thousand, four hundred ten".