1340454787 has 16 divisors (see below), whose sum is σ = 1591109632. Its totient is φ = 1105047360.

The previous prime is 1340454761. The next prime is 1340454803. The reversal of 1340454787 is 7874540431.

It is a cyclic number.

It is not a de Polignac number, because 1340454787 - 2⁷ = 1340454659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1340454727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16423 + ... + 54319.

It is an arithmetic number, because the mean of its divisors is an integer number (99444352).

Almost surely, 2^1340454787 is an apocalyptic number.

1340454787 is a deficient number, since it is larger than the sum of its proper divisors (250654845).

1340454787 is a wasteful number, since it uses less digits than its factorization.

1340454787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38098.

The product of its (nonzero) digits is 376320, while the sum is 43.

The square root of 1340454787 is about 36612.2218255052. The cubic root of 1340454787 is about 1102.5984814067.

The spelling of 1340454787 in words is "one billion, three hundred forty million, four hundred fifty-four thousand, seven hundred eighty-seven".