1901495 has 4 divisors (see below), whose sum is σ = 2281800. Its totient is φ = 1521192.

The previous prime is 1901489. The next prime is 1901507. The reversal of 1901495 is 5941091.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1901495 is a prime.

It is a congruent number.

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, 190145 + ... + 190154.

It is an arithmetic number, because the mean of its divisors is an integer number (570450).

2^1901495 is an apocalyptic number.

1901495 is a deficient number, since it is larger than the sum of its proper divisors (380305).

1901495 is an equidigital number, since it uses as much as digits as its factorization.

1901495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380304.

The product of its (nonzero) digits is 1620, while the sum is 29.

The square root of 1901495 is about 1378.9470620731. The cubic root of 1901495 is about 123.8887095462. Note that the first 3 decimals are identical.

The spelling of 1901495 in words is "one million, nine hundred one thousand, four hundred ninety-five".