1401539 has 8 divisors (see below), whose sum is σ = 1440960. Its totient is φ = 1362816.

The previous prime is 1401529. The next prime is 1401559. The reversal of 1401539 is 9351041.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1401539 - 2¹² = 1397443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1401529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8849 + ... + 9005.

It is an arithmetic number, because the mean of its divisors is an integer number (180120).

2^1401539 is an apocalyptic number.

1401539 is a deficient number, since it is larger than the sum of its proper divisors (39421).

1401539 is a wasteful number, since it uses less digits than its factorization.

1401539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 1401539 is about 1183.8661241880. The cubic root of 1401539 is about 111.9098711558.

The spelling of 1401539 in words is "one million, four hundred one thousand, five hundred thirty-nine".