1401540999 has 8 divisors (see below), whose sum is σ = 1869161712. Its totient is φ = 934140480.

The previous prime is 1401540977. The next prime is 1401541003. The reversal of 1401540999 is 9990451041.

It is a happy number.

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

It is not a de Polignac number, because 1401540999 - 2⁵ = 1401540967 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1401540999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401540919) 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, 39574 + ... + 66099.

It is an arithmetic number, because the mean of its divisors is an integer number (233645214).

Almost surely, 2^1401540999 is an apocalyptic number.

1401540999 is a deficient number, since it is larger than the sum of its proper divisors (467620713).

1401540999 is a wasteful number, since it uses less digits than its factorization.

1401540999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110097.

The product of its (nonzero) digits is 58320, while the sum is 42.

The square root of 1401540999 is about 37437.1606695807. The cubic root of 1401540999 is about 1119.0992436103.

The spelling of 1401540999 in words is "one billion, four hundred one million, five hundred forty thousand, nine hundred ninety-nine".