1022402 has 4 divisors (see below), whose sum is σ = 1533606. Its totient is φ = 511200.

The previous prime is 1022389. The next prime is 1022429. The reversal of 1022402 is 2042201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2042201 = 7 ⋅291743.

It can be written as a sum of positive squares in only one way, i.e., 900601 + 121801 = 949^2 + 349^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255599 + ... + 255602.

2^1022402 is an apocalyptic number.

1022402 is a deficient number, since it is larger than the sum of its proper divisors (511204).

1022402 is an equidigital number, since it uses as much as digits as its factorization.

1022402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511203.

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 1022402 is about 1011.1389617654. The cubic root of 1022402 is about 100.7412256047.

Adding to 1022402 its reverse (2042201), we get a palindrome (3064603).

It can be divided in two parts, 102240 and 2, that multiplied together give a triangular number (204480 = T₆₃₉).

The spelling of 1022402 in words is "one million, twenty-two thousand, four hundred two".