1505724001 has 4 divisors (see below), whose sum is σ = 1506014404. Its totient is φ = 1505433600.

The previous prime is 1505723981. The next prime is 1505724019. The reversal of 1505724001 is 1004275051.

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

It can be written as a sum of positive squares in 2 ways, for example, as 123743376 + 1381980625 = 11124^2 + 37175^2 .

It is a 5-Lehmer number, since φ(1505724001) divides (1505724001-1)⁵.

It is a cyclic number.

It is not a de Polignac number, because 1505724001 - 2⁵ = 1505723969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1505724041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137280 + ... + 147841.

It is an arithmetic number, because the mean of its divisors is an integer number (376503601).

Almost surely, 2^1505724001 is an apocalyptic number.

It is an amenable number.

1505724001 is a deficient number, since it is larger than the sum of its proper divisors (290403).

1505724001 is an equidigital number, since it uses as much as digits as its factorization.

1505724001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290402.

The product of its (nonzero) digits is 1400, while the sum is 25.

The square root of 1505724001 is about 38803.6596341118. The cubic root of 1505724001 is about 1146.1684711108.

Adding to 1505724001 its reverse (1004275051), we get a palindrome (2509999052).

The spelling of 1505724001 in words is "one billion, five hundred five million, seven hundred twenty-four thousand, one".