1509401 has 4 divisors (see below), whose sum is σ = 1520400. Its totient is φ = 1498404.

The previous prime is 1509377. The next prime is 1509407. The reversal of 1509401 is 1049051.

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 a de Polignac number, because none of the positive numbers 2^k-1509401 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1509407) 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, 5291 + ... + 5568.

It is an arithmetic number, because the mean of its divisors is an integer number (380100).

2^1509401 is an apocalyptic number.

It is an amenable number.

1509401 is a deficient number, since it is larger than the sum of its proper divisors (10999).

1509401 is a wasteful number, since it uses less digits than its factorization.

1509401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10998.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 1509401 is about 1228.5768189251. The cubic root of 1509401 is about 114.7100699145.

The spelling of 1509401 in words is "one million, five hundred nine thousand, four hundred one".