1900071 has 8 divisors (see below), whose sum is σ = 2814960. Its totient is φ = 1266696.

The previous prime is 1900049. The next prime is 1900079. The reversal of 1900071 is 1700091.

It is not a de Polignac number, because 1900071 - 2¹⁰ = 1899047 is a prime.

It is a super-2 number, since 2×1900071² = 7220539610082, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1900079) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35160 + ... + 35213.

It is an arithmetic number, because the mean of its divisors is an integer number (351870).

2^1900071 is an apocalyptic number.

1900071 is a deficient number, since it is larger than the sum of its proper divisors (914889).

1900071 is an equidigital number, since it uses as much as digits as its factorization.

1900071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70382 (or 70376 counting only the distinct ones).

The product of its (nonzero) digits is 63, while the sum is 18.

The square root of 1900071 is about 1378.4306293753. The cubic root of 1900071 is about 123.8577757144.

The spelling of 1900071 in words is "one million, nine hundred thousand, seventy-one".