1340122961 has 4 divisors (see below), whose sum is σ = 1340454000. Its totient is φ = 1339791924.

The previous prime is 1340122957. The next prime is 1340122999. The reversal of 1340122961 is 1692210431.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1692210431 = 10369 ⋅163199.

It is a cyclic number.

It is not a de Polignac number, because 1340122961 - 2² = 1340122957 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1340122921) 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, 159371 + ... + 167568.

It is an arithmetic number, because the mean of its divisors is an integer number (335113500).

Almost surely, 2^1340122961 is an apocalyptic number.

It is an amenable number.

1340122961 is a deficient number, since it is larger than the sum of its proper divisors (331039).

1340122961 is an equidigital number, since it uses as much as digits as its factorization.

1340122961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331038.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 1340122961 is about 36607.6899161911. The cubic root of 1340122961 is about 1102.5074921291.

The spelling of 1340122961 in words is "one billion, three hundred forty million, one hundred twenty-two thousand, nine hundred sixty-one".