1261377332 has 12 divisors (see below), whose sum is σ = 2211750660. Its totient is φ = 629448576.

The previous prime is 1261377329. The next prime is 1261377361. The reversal of 1261377332 is 2337731621.

It can be written as a sum of positive squares in 2 ways, for example, as 875804836 + 385572496 = 29594^2 + 19636^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1261377292 and 1261377301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 307733 + ... + 311804.

It is an arithmetic number, because the mean of its divisors is an integer number (184312555).

Almost surely, 2^1261377332 is an apocalyptic number.

It is an amenable number.

1261377332 is a deficient number, since it is larger than the sum of its proper divisors (950373328).

1261377332 is a wasteful number, since it uses less digits than its factorization.

1261377332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620050 (or 620048 counting only the distinct ones).

The product of its digits is 31752, while the sum is 35.

The square root of 1261377332 is about 35515.8743662605. The cubic root of 1261377332 is about 1080.4757083577.

The spelling of 1261377332 in words is "one billion, two hundred sixty-one million, three hundred seventy-seven thousand, three hundred thirty-two".