1900642 has 8 divisors (see below), whose sum is σ = 2869596. Its totient is φ = 944112.

The previous prime is 1900621. The next prime is 1900667. The reversal of 1900642 is 2460091.

It can be written as a sum of positive squares in 2 ways, for example, as 1661521 + 239121 = 1289^2 + 489^2 .

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

It is a super-2 number, since 2×1900642² = 7224880024328, which contains 22 as substring.

It is a plaindrome in base 12.

It is a zygodrome in base 12.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2713 + ... + 3340.

2^1900642 is an apocalyptic number.

1900642 is a deficient number, since it is larger than the sum of its proper divisors (968954).

1900642 is a wasteful number, since it uses less digits than its factorization.

1900642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6212.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 1900642 is about 1378.6377334166. The cubic root of 1900642 is about 123.8701815152.

The spelling of 1900642 in words is "one million, nine hundred thousand, six hundred forty-two".