1402521091 has 2 divisors, whose sum is σ = 1402521092. Its totient is φ = 1402521090.

The previous prime is 1402521061. The next prime is 1402521103. The reversal of 1402521091 is 1901252041.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1402521091 - 2¹¹ = 1402519043 is a prime.

It is not a weakly prime, because it can be changed into another prime (1402521061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 701260545 + 701260546.

It is an arithmetic number, because the mean of its divisors is an integer number (701260546).

Almost surely, 2^1402521091 is an apocalyptic number.

1402521091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1402521091 is an equidigital number, since it uses as much as digits as its factorization.

1402521091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 1402521091 is about 37450.2482101254. The cubic root of 1402521091 is about 1119.3600433654.

The spelling of 1402521091 in words is "one billion, four hundred two million, five hundred twenty-one thousand, ninety-one".