1301215723 has 4 divisors (see below), whose sum is σ = 1301359840. Its totient is φ = 1301071608.

The previous prime is 1301215693. The next prime is 1301215753. The reversal of 1301215723 is 3275121031.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1301215693) and next prime (1301215753).

It is a cyclic number.

It is not a de Polignac number, because 1301215723 - 2⁵ = 1301215691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1301215753) 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, 57540 + ... + 76897.

It is an arithmetic number, because the mean of its divisors is an integer number (325339960).

Almost surely, 2^1301215723 is an apocalyptic number.

1301215723 is a deficient number, since it is larger than the sum of its proper divisors (144117).

1301215723 is an equidigital number, since it uses as much as digits as its factorization.

1301215723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144116.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 1301215723 is about 36072.3678596235. The cubic root of 1301215723 is about 1091.7329902508.

Adding to 1301215723 its reverse (3275121031), we get a palindrome (4576336754).

The spelling of 1301215723 in words is "one billion, three hundred one million, two hundred fifteen thousand, seven hundred twenty-three".