1261611134 has 96 divisors (see below), whose sum is σ = 2452550400. Its totient is φ = 482993280.

The previous prime is 1261611133. The next prime is 1261611167. The reversal of 1261611134 is 4311161621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1261611133) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3811349 + ... + 3811679.

It is an arithmetic number, because the mean of its divisors is an integer number (25547400).

Almost surely, 2^1261611134 is an apocalyptic number.

1261611134 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1261611134 is a deficient number, since it is larger than the sum of its proper divisors (1190939266).

1261611134 is a wasteful number, since it uses less digits than its factorization.

1261611134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478 (or 471 counting only the distinct ones).

The product of its digits is 864, while the sum is 26.

The square root of 1261611134 is about 35519.1657278152. The cubic root of 1261611134 is about 1080.5424612552.

Adding to 1261611134 its reverse (4311161621), we get a palindrome (5572772755).

The spelling of 1261611134 in words is "one billion, two hundred sixty-one million, six hundred eleven thousand, one hundred thirty-four".