1402134821 has 4 divisors (see below), whose sum is σ = 1402689600. Its totient is φ = 1401580044.

The previous prime is 1402134817. The next prime is 1402134827. The reversal of 1402134821 is 1284312041.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1284312041 = 2081 ⋅617161.

It is a cyclic number.

It is not a de Polignac number, because 1402134821 - 2² = 1402134817 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1402134827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 273581 + ... + 278658.

It is an arithmetic number, because the mean of its divisors is an integer number (350672400).

Almost surely, 2^1402134821 is an apocalyptic number.

It is an amenable number.

1402134821 is a deficient number, since it is larger than the sum of its proper divisors (554779).

1402134821 is an equidigital number, since it uses as much as digits as its factorization.

1402134821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554778.

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 1402134821 is about 37445.0907463181. The cubic root of 1402134821 is about 1119.2572725036.

Adding to 1402134821 its reverse (1284312041), we get a palindrome (2686446862).

The spelling of 1402134821 in words is "one billion, four hundred two million, one hundred thirty-four thousand, eight hundred twenty-one".