1954945 has 4 divisors (see below), whose sum is σ = 2345940. Its totient is φ = 1563952.

The previous prime is 1954943. The next prime is 1954951. The reversal of 1954945 is 5494591.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5494591 = 19 ⋅289189.

It can be written as a sum of positive squares in 2 ways, for example, as 1106704 + 848241 = 1052^2 + 921^2 .

It is a cyclic number.

It is not a de Polignac number, because 1954945 - 2¹ = 1954943 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1954943) 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, 195490 + ... + 195499.

It is an arithmetic number, because the mean of its divisors is an integer number (586485).

2^1954945 is an apocalyptic number.

It is an amenable number.

1954945 is a deficient number, since it is larger than the sum of its proper divisors (390995).

1954945 is an equidigital number, since it uses as much as digits as its factorization.

1954945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390994.

The product of its digits is 32400, while the sum is 37.

The square root of 1954945 is about 1398.1934773128. The cubic root of 1954945 is about 125.0388146128.

The spelling of 1954945 in words is "one million, nine hundred fifty-four thousand, nine hundred forty-five".