1501440401 has 4 divisors (see below), whose sum is σ = 1580463600. Its totient is φ = 1422417204.

The previous prime is 1501440389. The next prime is 1501440407. The reversal of 1501440401 is 1040441051.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1501440401 - 2¹⁸ = 1501178257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1501440407) 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, 39511571 + ... + 39511608.

It is an arithmetic number, because the mean of its divisors is an integer number (395115900).

Almost surely, 2^1501440401 is an apocalyptic number.

It is an amenable number.

1501440401 is a deficient number, since it is larger than the sum of its proper divisors (79023199).

1501440401 is an equidigital number, since it uses as much as digits as its factorization.

1501440401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79023198.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 1501440401 is about 38748.4244970037. The cubic root of 1501440401 is about 1145.0805358962.

Adding to 1501440401 its reverse (1040441051), we get a palindrome (2541881452).

The spelling of 1501440401 in words is "one billion, five hundred one million, four hundred forty thousand, four hundred one".