1520906 has 4 divisors (see below), whose sum is σ = 2281362. Its totient is φ = 760452.

The previous prime is 1520903. The next prime is 1520923. The reversal of 1520906 is 6090251.

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., 1190281 + 330625 = 1091^2 + 575^2 .

It is not an unprimeable number, because it can be changed into a prime (1520903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 380225 + ... + 380228.

2^1520906 is an apocalyptic number.

1520906 is a deficient number, since it is larger than the sum of its proper divisors (760456).

1520906 is an equidigital number, since it uses as much as digits as its factorization.

1520906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760455.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 1520906 is about 1233.2501773768. The cubic root of 1520906 is about 115.0007813431. Note that the first 3 decimals are identical.

The spelling of 1520906 in words is "one million, five hundred twenty thousand, nine hundred six".