1400861465 has 4 divisors (see below), whose sum is σ = 1681033764. Its totient is φ = 1120689168.

The previous prime is 1400861447. The next prime is 1400861479. The reversal of 1400861465 is 5641680041.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 378652681 + 1022208784 = 19459^2 + 31972^2 .

It is a cyclic number.

It is not a de Polignac number, because 1400861465 - 2¹² = 1400857369 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140086142 + ... + 140086151.

It is an arithmetic number, because the mean of its divisors is an integer number (420258441).

Almost surely, 2^1400861465 is an apocalyptic number.

It is an amenable number.

1400861465 is a deficient number, since it is larger than the sum of its proper divisors (280172299).

1400861465 is an equidigital number, since it uses as much as digits as its factorization.

1400861465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280172298.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 1400861465 is about 37428.0839076755. The cubic root of 1400861465 is about 1118.9183501218.

The spelling of 1400861465 in words is "one billion, four hundred million, eight hundred sixty-one thousand, four hundred sixty-five".