1501231 has 4 divisors (see below), whose sum is σ = 1507464. Its totient is φ = 1495000.

The previous prime is 1501229. The next prime is 1501261. The reversal of 1501231 is 1321051.

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

It is a cyclic number.

It is not a de Polignac number, because 1501231 - 2¹ = 1501229 is a prime.

It is a super-2 number, since 2×1501231² = 4507389030722, which contains 22 as substring.

It is a Duffinian number.

1501231 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1501261) 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, 2740 + ... + 3241.

It is an arithmetic number, because the mean of its divisors is an integer number (376866).

2^1501231 is an apocalyptic number.

1501231 is a deficient number, since it is larger than the sum of its proper divisors (6233).

1501231 is an equidigital number, since it uses as much as digits as its factorization.

1501231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6232.

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 1501231 is about 1225.2473219722. The cubic root of 1501231 is about 114.5027299871.

Adding to 1501231 its reverse (1321051), we get a palindrome (2822282).

The spelling of 1501231 in words is "one million, five hundred one thousand, two hundred thirty-one".