1906057 has 4 divisors (see below), whose sum is σ = 2018196. Its totient is φ = 1793920.

The previous prime is 1906043. The next prime is 1906063. The reversal of 1906057 is 7506091.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7506091 = 467 ⋅16073.

It can be written as a sum of positive squares in 2 ways, for example, as 687241 + 1218816 = 829^2 + 1104^2 .

It is a cyclic number.

It is not a de Polignac number, because 1906057 - 2¹⁹ = 1381769 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (1906007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56044 + ... + 56077.

It is an arithmetic number, because the mean of its divisors is an integer number (504549).

2^1906057 is an apocalyptic number.

1906057 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1906057 is a deficient number, since it is larger than the sum of its proper divisors (112139).

1906057 is a wasteful number, since it uses less digits than its factorization.

1906057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112138.

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 1906057 is about 1380.6002317833. The cubic root of 1906057 is about 123.9877068979.

The spelling of 1906057 in words is "one million, nine hundred six thousand, fifty-seven".