1520231 has 8 divisors (see below), whose sum is σ = 1600224. Its totient is φ = 1441440.

The previous prime is 1520227. The next prime is 1520251. The reversal of 1520231 is 1320251.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1520231 - 2² = 1520227 is a prime.

It is a super-2 number, since 2×1520231² = 4622204586722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1520221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3401 + ... + 3821.

It is an arithmetic number, because the mean of its divisors is an integer number (200028).

2^1520231 is an apocalyptic number.

1520231 is a deficient number, since it is larger than the sum of its proper divisors (79993).

1520231 is a wasteful number, since it uses less digits than its factorization.

1520231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 601.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 1520231 is about 1232.9764799054. The cubic root of 1520231 is about 114.9837658243.

Adding to 1520231 its reverse (1320251), we get a palindrome (2840482).

The spelling of 1520231 in words is "one million, five hundred twenty thousand, two hundred thirty-one".