1340556141 has 4 divisors (see below), whose sum is σ = 1787408192. Its totient is φ = 893704092.

The previous prime is 1340556121. The next prime is 1340556149. The reversal of 1340556141 is 1416550431.

It is a happy number.

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 not a de Polignac number, because 1340556141 - 2¹¹ = 1340554093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1340556099 and 1340556108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340556149) 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 3 ways as a sum of consecutive naturals, for example, 223426021 + ... + 223426026.

It is an arithmetic number, because the mean of its divisors is an integer number (446852048).

Almost surely, 2^1340556141 is an apocalyptic number.

It is an amenable number.

1340556141 is a deficient number, since it is larger than the sum of its proper divisors (446852051).

1340556141 is an equidigital number, since it uses as much as digits as its factorization.

1340556141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446852050.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 1340556141 is about 36613.6059546175. The cubic root of 1340556141 is about 1102.6262704703.

The spelling of 1340556141 in words is "one billion, three hundred forty million, five hundred fifty-six thousand, one hundred forty-one".