1402266521 has 2 divisors, whose sum is σ = 1402266522. Its totient is φ = 1402266520.

The previous prime is 1402266499. The next prime is 1402266533. The reversal of 1402266521 is 1256622041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1394200921 + 8065600 = 37339^2 + 2840^2 .

It is an emirp because it is prime and its reverse (1256622041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1402266521 - 2¹⁰ = 1402265497 is a prime.

It is not a weakly prime, because it can be changed into another prime (1402266571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 701133260 + 701133261.

It is an arithmetic number, because the mean of its divisors is an integer number (701133261).

Almost surely, 2^1402266521 is an apocalyptic number.

It is an amenable number.

1402266521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1402266521 is an equidigital number, since it uses as much as digits as its factorization.

1402266521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 1402266521 is about 37446.8492800129. The cubic root of 1402266521 is about 1119.2923146801.

Adding to 1402266521 its reverse (1256622041), we get a palindrome (2658888562).

The spelling of 1402266521 in words is "one billion, four hundred two million, two hundred sixty-six thousand, five hundred twenty-one".