1624402 has 8 divisors (see below), whose sum is σ = 2624076. Its totient is φ = 749712.

The previous prime is 1624387. The next prime is 1624417. The reversal of 1624402 is 2044261.

It is an interprime number because it is at equal distance from previous prime (1624387) and next prime (1624417).

It can be written as a sum of positive squares in 2 ways, for example, as 1413721 + 210681 = 1189^2 + 459^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1624402.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31213 + ... + 31264.

2^1624402 is an apocalyptic number.

1624402 is a deficient number, since it is larger than the sum of its proper divisors (999674).

1624402 is a wasteful number, since it uses less digits than its factorization.

1624402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62492.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1624402 is about 1274.5203019175. The cubic root of 1624402 is about 117.5523110972.

Adding to 1624402 its reverse (2044261), we get a palindrome (3668663).

It can be divided in two parts, 1 and 624402, that added together give a triangular number (624403 = T₁₁₁₇).

The spelling of 1624402 in words is "one million, six hundred twenty-four thousand, four hundred two".