1402504121 has 2 divisors, whose sum is σ = 1402504122. Its totient is φ = 1402504120.

The previous prime is 1402504087. The next prime is 1402504141. The reversal of 1402504121 is 1214052041.

It is a happy number.

It is an a-pointer prime, because the next prime (1402504141) can be obtained adding 1402504121 to its sum of digits (20).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1215498496 + 187005625 = 34864^2 + 13675^2 .

It is an emirp because it is prime and its reverse (1214052041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1402504121 - 2¹⁰ = 1402503097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1402504093 and 1402504102.

It is not a weakly prime, because it can be changed into another prime (1402504141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 701252060 + 701252061.

It is an arithmetic number, because the mean of its divisors is an integer number (701252061).

Almost surely, 2^1402504121 is an apocalyptic number.

It is an amenable number.

1402504121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1402504121 is an equidigital number, since it uses as much as digits as its factorization.

1402504121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 1402504121 is about 37450.0216421833. The cubic root of 1402504121 is about 1119.3555287294.

Adding to 1402504121 its reverse (1214052041), we get a palindrome (2616556162).

The spelling of 1402504121 in words is "one billion, four hundred two million, five hundred four thousand, one hundred twenty-one".