1506401 has 4 divisors (see below), whose sum is σ = 1622292. Its totient is φ = 1390512.

The previous prime is 1506391. The next prime is 1506413. The reversal of 1506401 is 1046051.

It is a happy number.

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 160801 + 1345600 = 401^2 + 1160^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1506401 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1506401.

It is not an unprimeable number, because it can be changed into a prime (1503401) 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, 57926 + ... + 57951.

It is an arithmetic number, because the mean of its divisors is an integer number (405573).

2^1506401 is an apocalyptic number.

It is an amenable number.

1506401 is a deficient number, since it is larger than the sum of its proper divisors (115891).

1506401 is a wasteful number, since it uses less digits than its factorization.

1506401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115890.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 1506401 is about 1227.3552867854. The cubic root of 1506401 is about 114.6340224288.

The spelling of 1506401 in words is "one million, five hundred six thousand, four hundred one".