1261463536 has 10 divisors (see below), whose sum is σ = 2444085632. Its totient is φ = 630731760.

The previous prime is 1261463507. The next prime is 1261463551. The reversal of 1261463536 is 6353641621.

It is a junction number, because it is equal to n+sod(n) for n = 1261463495 and 1261463504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39420720 + ... + 39420751.

Almost surely, 2^1261463536 is an apocalyptic number.

1261463536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1261463536 is a deficient number, since it is larger than the sum of its proper divisors (1182622096).

1261463536 is an equidigital number, since it uses as much as digits as its factorization.

1261463536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78841479 (or 78841473 counting only the distinct ones).

The product of its digits is 77760, while the sum is 37.

The square root of 1261463536 is about 35517.0879436927. The cubic root of 1261463536 is about 1080.5003214543.

The spelling of 1261463536 in words is "one billion, two hundred sixty-one million, four hundred sixty-three thousand, five hundred thirty-six".