1402021129 has 2 divisors, whose sum is σ = 1402021130. Its totient is φ = 1402021128.

The previous prime is 1402021109. The next prime is 1402021157. The reversal of 1402021129 is 9211202041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1276132729 + 125888400 = 35723^2 + 11220^2 .

It is a cyclic number.

It is not a de Polignac number, because 1402021129 - 2¹¹ = 1402019081 is a prime.

It is not a weakly prime, because it can be changed into another prime (1402021109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 701010564 + 701010565.

It is an arithmetic number, because the mean of its divisors is an integer number (701010565).

Almost surely, 2^1402021129 is an apocalyptic number.

It is an amenable number.

1402021129 is a deficient number, since it is larger than the sum of its proper divisors (1).

1402021129 is an equidigital number, since it uses as much as digits as its factorization.

1402021129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 1402021129 is about 37443.5725993127. The cubic root of 1402021129 is about 1119.2270200544.

The spelling of 1402021129 in words is "one billion, four hundred two million, twenty-one thousand, one hundred twenty-nine".