1401868065 has 32 divisors (see below), whose sum is σ = 2420966016. Its totient is φ = 688596480.

The previous prime is 1401868063. The next prime is 1401868067. The reversal of 1401868065 is 5608681041.

It is an interprime number because it is at equal distance from previous prime (1401868063) and next prime (1401868067).

It is not a de Polignac number, because 1401868065 - 2¹ = 1401868063 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (1401868063) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81250 + ... + 96980.

It is an arithmetic number, because the mean of its divisors is an integer number (75655188).

Almost surely, 2^1401868065 is an apocalyptic number.

1401868065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1401868065 is a deficient number, since it is larger than the sum of its proper divisors (1019097951).

1401868065 is a wasteful number, since it uses less digits than its factorization.

1401868065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16209.

The product of its (nonzero) digits is 46080, while the sum is 39.

The square root of 1401868065 is about 37441.5286146279. The cubic root of 1401868065 is about 1119.1862884763.

The spelling of 1401868065 in words is "one billion, four hundred one million, eight hundred sixty-eight thousand, sixty-five".