1261684532 has 6 divisors (see below), whose sum is σ = 2207947938. Its totient is φ = 630842264.

The previous prime is 1261684517. The next prime is 1261684537. The reversal of 1261684532 is 2354861621.

It can be written as a sum of positive squares in only one way, i.e., 1259824036 + 1860496 = 35494^2 + 1364^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1261684537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157710563 + ... + 157710570.

It is an arithmetic number, because the mean of its divisors is an integer number (367991323).

Almost surely, 2^1261684532 is an apocalyptic number.

It is an amenable number.

1261684532 is a deficient number, since it is larger than the sum of its proper divisors (946263406).

1261684532 is a wasteful number, since it uses less digits than its factorization.

1261684532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315421137 (or 315421135 counting only the distinct ones).

The product of its digits is 69120, while the sum is 38.

The square root of 1261684532 is about 35520.1989296231. The cubic root of 1261684532 is about 1080.5634154451.

The spelling of 1261684532 in words is "one billion, two hundred sixty-one million, six hundred eighty-four thousand, five hundred thirty-two".