1102421 has 4 divisors (see below), whose sum is σ = 1112832. Its totient is φ = 1092012.

The previous prime is 1102411. The next prime is 1102427. The reversal of 1102421 is 1242011.

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.

It is a cyclic number.

It is not a de Polignac number, because 1102421 - 2¹⁸ = 840277 is a prime.

It is a super-2 number, since 2×1102421² = 2430664122482, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1102427) 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, 5045 + ... + 5258.

It is an arithmetic number, because the mean of its divisors is an integer number (278208).

2^1102421 is an apocalyptic number.

It is an amenable number.

1102421 is a deficient number, since it is larger than the sum of its proper divisors (10411).

1102421 is a wasteful number, since it uses less digits than its factorization.

1102421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10410.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1102421 is about 1049.9623802785. The cubic root of 1102421 is about 103.3036878769.

Adding to 1102421 its reverse (1242011), we get a palindrome (2344432).

The spelling of 1102421 in words is "one million, one hundred two thousand, four hundred twenty-one".