1261587327 has 64 divisors (see below), whose sum is σ = 2377482240. Its totient is φ = 573091200.

The previous prime is 1261587311. The next prime is 1261587331. The reversal of 1261587327 is 7237851621.

It is not a de Polignac number, because 1261587327 - 2⁴ = 1261587311 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1261587307) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 46002 + ... + 68112.

It is an arithmetic number, because the mean of its divisors is an integer number (37148160).

Almost surely, 2^1261587327 is an apocalyptic number.

1261587327 is a deficient number, since it is larger than the sum of its proper divisors (1115894913).

1261587327 is a wasteful number, since it uses less digits than its factorization.

1261587327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22164.

The product of its digits is 141120, while the sum is 42.

The square root of 1261587327 is about 35518.8305973043. The cubic root of 1261587327 is about 1080.5356644868.

The spelling of 1261587327 in words is "one billion, two hundred sixty-one million, five hundred eighty-seven thousand, three hundred twenty-seven".