1425641 has 4 divisors (see below), whose sum is σ = 1629312. Its totient is φ = 1221972.

The previous prime is 1425629. The next prime is 1425649. The reversal of 1425641 is 1465241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1465241 = 1061 ⋅1381.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1425641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1425649) 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, 101825 + ... + 101838.

It is an arithmetic number, because the mean of its divisors is an integer number (407328).

2^1425641 is an apocalyptic number.

It is an amenable number.

1425641 is a deficient number, since it is larger than the sum of its proper divisors (203671).

1425641 is an equidigital number, since it uses as much as digits as its factorization.

1425641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203670.

The product of its digits is 960, while the sum is 23.

The square root of 1425641 is about 1194.0020938005. The cubic root of 1425641 is about 112.5477262521.

The spelling of 1425641 in words is "one million, four hundred twenty-five thousand, six hundred forty-one".