1625434 has 4 divisors (see below), whose sum is σ = 2438154. Its totient is φ = 812716.

The previous prime is 1625419. The next prime is 1625453. The reversal of 1625434 is 4345261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4345261 = 103 ⋅42187.

It can be written as a sum of positive squares in only one way, i.e., 1199025 + 426409 = 1095^2 + 653^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1625399 and 1625408.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406357 + ... + 406360.

2^1625434 is an apocalyptic number.

1625434 is a deficient number, since it is larger than the sum of its proper divisors (812720).

1625434 is an equidigital number, since it uses as much as digits as its factorization.

1625434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812719.

The product of its digits is 2880, while the sum is 25.

The square root of 1625434 is about 1274.9250958390. The cubic root of 1625434 is about 117.5771999083.

The spelling of 1625434 in words is "one million, six hundred twenty-five thousand, four hundred thirty-four".