1409642 has 8 divisors (see below), whose sum is σ = 2277156. Its totient is φ = 650592.

The previous prime is 1409633. The next prime is 1409651. The reversal of 1409642 is 2469041.

It is an interprime number because it is at equal distance from previous prime (1409633) and next prime (1409651).

It can be written as a sum of positive squares in 2 ways, for example, as 1168561 + 241081 = 1081^2 + 491^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (26), and also a Moran number because the ratio is a prime number: 54217 = 1409642 / (1 + 4 + 0 + 9 + 6 + 4 + 2).

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, 27083 + ... + 27134.

2^1409642 is an apocalyptic number.

1409642 is a deficient number, since it is larger than the sum of its proper divisors (867514).

1409642 is a wasteful number, since it uses less digits than its factorization.

1409642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54232.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 1409642 is about 1187.2834539401. The cubic root of 1409642 is about 112.1251258892.

The spelling of 1409642 in words is "one million, four hundred nine thousand, six hundred forty-two".