1401412861 has 4 divisors (see below), whose sum is σ = 1401496924. Its totient is φ = 1401328800.

The previous prime is 1401412853. The next prime is 1401412897. The reversal of 1401412861 is 1682141041.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1068897636 + 332515225 = 32694^2 + 18235^2 .

It is a cyclic number.

It is not a de Polignac number, because 1401412861 - 2³ = 1401412853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401418861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7650 + ... + 53491.

It is an arithmetic number, because the mean of its divisors is an integer number (350374231).

Almost surely, 2^1401412861 is an apocalyptic number.

It is an amenable number.

1401412861 is a deficient number, since it is larger than the sum of its proper divisors (84063).

1401412861 is an equidigital number, since it uses as much as digits as its factorization.

1401412861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84062.

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 1401412861 is about 37435.4492560194. The cubic root of 1401412861 is about 1119.0651374587.

The spelling of 1401412861 in words is "one billion, four hundred one million, four hundred twelve thousand, eight hundred sixty-one".