1395007121 has 2 divisors, whose sum is σ = 1395007122. Its totient is φ = 1395007120.

The previous prime is 1395007087. The next prime is 1395007123. The reversal of 1395007121 is 1217005931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1393976896 + 1030225 = 37336^2 + 1015^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1395007121 is a prime.

Together with 1395007123, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1395007123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 697503560 + 697503561.

It is an arithmetic number, because the mean of its divisors is an integer number (697503561).

Almost surely, 2^1395007121 is an apocalyptic number.

It is an amenable number.

1395007121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1395007121 is an equidigital number, since it uses as much as digits as its factorization.

1395007121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1890, while the sum is 29.

The square root of 1395007121 is about 37349.7941225919. The cubic root of 1395007121 is about 1117.3574821712.

The spelling of 1395007121 in words is "one billion, three hundred ninety-five million, seven thousand, one hundred twenty-one".