1401540 has 96 divisors (see below), whose sum is σ = 4644864. Its totient is φ = 309120.

The previous prime is 1401529. The next prime is 1401559. The reversal of 1401540 is 451041.

It is a Harshad number since it is a multiple of its sum of digits (15).

1401540 is a modest number, since divided by 1540 gives 140 as remainder.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19705 + ... + 19775.

It is an arithmetic number, because the mean of its divisors is an integer number (48384).

2^1401540 is an apocalyptic number.

1401540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1401540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2322432).

1401540 is an abundant number, since it is smaller than the sum of its proper divisors (3243324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1401540 is a wasteful number, since it uses less digits than its factorization.

1401540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137 (or 135 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 1401540 is about 1183.8665465330. The cubic root of 1401540 is about 111.9098977717.

Adding to 1401540 its reverse (451041), we get a palindrome (1852581).

The spelling of 1401540 in words is "one million, four hundred one thousand, five hundred forty".