1520642 has 4 divisors (see below), whose sum is σ = 2280966. Its totient is φ = 760320.

The previous prime is 1520639. The next prime is 1520653. The reversal of 1520642 is 2460251.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2460251 = 107 ⋅22993.

It can be written as a sum of positive squares in only one way, i.e., 1510441 + 10201 = 1229^2 + 101^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 380159 + ... + 380162.

2^1520642 is an apocalyptic number.

1520642 is a deficient number, since it is larger than the sum of its proper divisors (760324).

1520642 is an equidigital number, since it uses as much as digits as its factorization.

1520642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760323.

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

The square root of 1520642 is about 1233.1431384880. The cubic root of 1520642 is about 114.9941269843.

Adding to 1520642 its reverse (2460251), we get a palindrome (3980893).

The spelling of 1520642 in words is "one million, five hundred twenty thousand, six hundred forty-two".