1025642 has 4 divisors (see below), whose sum is σ = 1538466. Its totient is φ = 512820.

The previous prime is 1025641. The next prime is 1025653. The reversal of 1025642 is 2465201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 591361 + 434281 = 769^2 + 659^2 .

It is not an unprimeable number, because it can be changed into a prime (1025641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256409 + ... + 256412.

2^1025642 is an apocalyptic number.

1025642 is a deficient number, since it is larger than the sum of its proper divisors (512824).

1025642 is an equidigital number, since it uses as much as digits as its factorization.

1025642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512823.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1025642 is about 1012.7398481348. The cubic root of 1025642 is about 100.8475299699.

It can be divided in two parts, 10 and 25642, that added together give a palindrome (25652).

The spelling of 1025642 in words is "one million, twenty-five thousand, six hundred forty-two".