1957426 has 4 divisors (see below), whose sum is σ = 2936142. Its totient is φ = 978712.

The previous prime is 1957391. The next prime is 1957441. The reversal of 1957426 is 6247591.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6247591 = 7 ⋅892513.

It can be written as a sum of positive squares in only one way, i.e., 1957201 + 225 = 1399^2 + 15^2 .

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1957391 and 1957400.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489355 + ... + 489358.

2^1957426 is an apocalyptic number.

1957426 is a deficient number, since it is larger than the sum of its proper divisors (978716).

1957426 is an equidigital number, since it uses as much as digits as its factorization.

1957426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 978715.

The product of its digits is 15120, while the sum is 34.

The square root of 1957426 is about 1399.0804122709. The cubic root of 1957426 is about 125.0916873976.

It can be divided in two parts, 19574 and 26, that added together give a square (19600 = 140²).

The spelling of 1957426 in words is "one million, nine hundred fifty-seven thousand, four hundred twenty-six".