1261607026 has 32 divisors (see below), whose sum is σ = 2033165232. Its totient is φ = 585031680.

The previous prime is 1261606999. The next prime is 1261607027. The reversal of 1261607026 is 6207061621.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 531256401 + 730350625 = 23049^2 + 27025^2 .

It is not an unprimeable number, because it can be changed into a prime (1261607027) 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, 912856 + ... + 914236.

Almost surely, 2^1261607026 is an apocalyptic number.

1261607026 is a deficient number, since it is larger than the sum of its proper divisors (771558206).

1261607026 is a wasteful number, since it uses less digits than its factorization.

1261607026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1774.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 1261607026 is about 35519.1078998333. The cubic root of 1261607026 is about 1080.5412884498.

Adding to 1261607026 its reverse (6207061621), we get a palindrome (7468668647).

The spelling of 1261607026 in words is "one billion, two hundred sixty-one million, six hundred seven thousand, twenty-six".