1340257874 has 4 divisors (see below), whose sum is σ = 2010386814. Its totient is φ = 670128936.

The previous prime is 1340257861. The next prime is 1340257907. The reversal of 1340257874 is 4787520431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4787520431 = 41 ⋅116768791.

It can be written as a sum of positive squares in only one way, i.e., 1068832249 + 271425625 = 32693^2 + 16475^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335064467 + ... + 335064470.

Almost surely, 2^1340257874 is an apocalyptic number.

1340257874 is a deficient number, since it is larger than the sum of its proper divisors (670128940).

1340257874 is an equidigital number, since it uses as much as digits as its factorization.

1340257874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670128939.

The product of its (nonzero) digits is 188160, while the sum is 41.

The square root of 1340257874 is about 36609.5325564258. The cubic root of 1340257874 is about 1102.5444881378.

The spelling of 1340257874 in words is "one billion, three hundred forty million, two hundred fifty-seven thousand, eight hundred seventy-four".