1261132502 has 24 divisors (see below), whose sum is σ = 2223250344. Its totient is φ = 534909312.

The previous prime is 1261132463. The next prime is 1261132511. The reversal of 1261132502 is 2052311621.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56828 + ... + 75839.

It is an arithmetic number, because the mean of its divisors is an integer number (92635431).

Almost surely, 2^1261132502 is an apocalyptic number.

1261132502 is a deficient number, since it is larger than the sum of its proper divisors (962117842).

1261132502 is a wasteful number, since it uses less digits than its factorization.

1261132502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132780 (or 132773 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1261132502 is about 35512.4274304081. The cubic root of 1261132502 is about 1080.4057980098.

The spelling of 1261132502 in words is "one billion, two hundred sixty-one million, one hundred thirty-two thousand, five hundred two".