1400775421 has 2 divisors, whose sum is σ = 1400775422. Its totient is φ = 1400775420.

The previous prime is 1400775407. The next prime is 1400775433. The reversal of 1400775421 is 1245770041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1336999225 + 63776196 = 36565^2 + 7986^2 .

It is a cyclic number.

It is not a de Polignac number, because 1400775421 - 2⁷ = 1400775293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1400775491) 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, 700387710 + 700387711.

It is an arithmetic number, because the mean of its divisors is an integer number (700387711).

Almost surely, 2^1400775421 is an apocalyptic number.

It is an amenable number.

1400775421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1400775421 is an equidigital number, since it uses as much as digits as its factorization.

1400775421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7840, while the sum is 31.

The square root of 1400775421 is about 37426.9344323042. The cubic root of 1400775421 is about 1118.8954408420.

The spelling of 1400775421 in words is "one billion, four hundred million, seven hundred seventy-five thousand, four hundred twenty-one".