1261533411 has 12 divisors (see below), whose sum is σ = 1822638480. Its totient is φ = 840826800.

The previous prime is 1261533347. The next prime is 1261533479. The reversal of 1261533411 is 1143351621.

It is a happy number.

1261533411 is a `hidden beast` number, since 1 + 2 + 615 + 3 + 3 + 41 + 1 = 666.

It is not a de Polignac number, because 1261533411 - 2⁶ = 1261533347 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1261533491) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32170 + ... + 59648.

It is an arithmetic number, because the mean of its divisors is an integer number (151886540).

Almost surely, 2^1261533411 is an apocalyptic number.

1261533411 is a deficient number, since it is larger than the sum of its proper divisors (561105069).

1261533411 is a wasteful number, since it uses less digits than its factorization.

1261533411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32586 (or 32583 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 1261533411 is about 35518.0716115050. The cubic root of 1261533411 is about 1080.5202714473.

The spelling of 1261533411 in words is "one billion, two hundred sixty-one million, five hundred thirty-three thousand, four hundred eleven".