1400135641 has 2 divisors, whose sum is σ = 1400135642. Its totient is φ = 1400135640.

The previous prime is 1400135621. The next prime is 1400135663. The reversal of 1400135641 is 1465310041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1046846025 + 353289616 = 32355^2 + 18796^2 .

It is a cyclic number.

It is not a de Polignac number, because 1400135641 - 2⁹ = 1400135129 is a prime.

It is not a weakly prime, because it can be changed into another prime (1400135621) 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 as a sum of consecutive naturals, namely, 700067820 + 700067821.

It is an arithmetic number, because the mean of its divisors is an integer number (700067821).

Almost surely, 2^1400135641 is an apocalyptic number.

It is an amenable number.

1400135641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1400135641 is an equidigital number, since it uses as much as digits as its factorization.

1400135641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1400135641 is about 37418.3864029437. The cubic root of 1400135641 is about 1118.7250695068.

Adding to 1400135641 its reverse (1465310041), we get a palindrome (2865445682).

The spelling of 1400135641 in words is "one billion, four hundred million, one hundred thirty-five thousand, six hundred forty-one".