1261610067 has 16 divisors (see below), whose sum is σ = 1746968960. Its totient is φ = 809246592.

The previous prime is 1261610059. The next prime is 1261610071. The reversal of 1261610067 is 7600161621.

It is not a de Polignac number, because 1261610067 - 2³ = 1261610059 is a prime.

It is a super-2 number, since 2×1261610067² = 3183319922311488978, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1261610047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64342 + ... + 81627.

It is an arithmetic number, because the mean of its divisors is an integer number (109185560).

Almost surely, 2^1261610067 is an apocalyptic number.

1261610067 is a deficient number, since it is larger than the sum of its proper divisors (485358893).

1261610067 is a wasteful number, since it uses less digits than its factorization.

1261610067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146082.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 1261610067 is about 35519.1507077520. The cubic root of 1261610067 is about 1080.5421566344.

Adding to 1261610067 its reverse (7600161621), we get a palindrome (8861771688).

The spelling of 1261610067 in words is "one billion, two hundred sixty-one million, six hundred ten thousand, sixty-seven".