1901642 has 8 divisors (see below), whose sum is σ = 2858436. Its totient is φ = 948832.

The previous prime is 1901639. The next prime is 1901651. The reversal of 1901642 is 2461091.

It is a happy number.

It is a Cunningham number, because it is equal to 1379²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 1901641 + 1 = 1379^2 + 1^2 .

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

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, 998 + ... + 2190.

2^1901642 is an apocalyptic number.

1901642 is a deficient number, since it is larger than the sum of its proper divisors (956794).

1901642 is a wasteful number, since it uses less digits than its factorization.

1901642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1992.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 1901642 is about 1379.0003625815. Note that the first 3 decimals coincide. The cubic root of 1901642 is about 123.8919019766.

The spelling of 1901642 in words is "one million, nine hundred one thousand, six hundred forty-two".