1306788461 has 4 divisors (see below), whose sum is σ = 1425587424. Its totient is φ = 1187989500.

The previous prime is 1306788409. The next prime is 1306788473. The reversal of 1306788461 is 1648876031.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1306788461 - 2⁶ = 1306788397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1306788481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59399465 + ... + 59399486.

It is an arithmetic number, because the mean of its divisors is an integer number (356396856).

Almost surely, 2^1306788461 is an apocalyptic number.

1306788461 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1306788461 is a deficient number, since it is larger than the sum of its proper divisors (118798963).

1306788461 is a wasteful number, since it uses less digits than its factorization.

1306788461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118798962.

The product of its (nonzero) digits is 193536, while the sum is 44.

The square root of 1306788461 is about 36149.5291947212. The cubic root of 1306788461 is about 1093.2892982360.

The spelling of 1306788461 in words is "one billion, three hundred six million, seven hundred eighty-eight thousand, four hundred sixty-one".