1261147436 has 6 divisors (see below), whose sum is σ = 2207008020. Its totient is φ = 630573716.

The previous prime is 1261147429. The next prime is 1261147441. The reversal of 1261147436 is 6347411621.

It is a junction number, because it is equal to n+sod(n) for n = 1261147396 and 1261147405.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157643426 + ... + 157643433.

It is an arithmetic number, because the mean of its divisors is an integer number (367834670).

Almost surely, 2^1261147436 is an apocalyptic number.

It is an amenable number.

1261147436 is a deficient number, since it is larger than the sum of its proper divisors (945860584).

1261147436 is a wasteful number, since it uses less digits than its factorization.

1261147436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315286863 (or 315286861 counting only the distinct ones).

The product of its digits is 24192, while the sum is 35.

The square root of 1261147436 is about 35512.6376942068. The cubic root of 1261147436 is about 1080.4100626202.

The spelling of 1261147436 in words is "one billion, two hundred sixty-one million, one hundred forty-seven thousand, four hundred thirty-six".