1401611871 has 16 divisors (see below), whose sum is σ = 2077176960. Its totient is φ = 833433120.

The previous prime is 1401611851. The next prime is 1401611873. The reversal of 1401611871 is 1781161041.

It is not a de Polignac number, because 1401611871 - 2⁵ = 1401611839 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401611873) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 398941 + ... + 402438.

It is an arithmetic number, because the mean of its divisors is an integer number (129823560).

Almost surely, 2^1401611871 is an apocalyptic number.

1401611871 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1401611871 is a deficient number, since it is larger than the sum of its proper divisors (675565089).

1401611871 is a wasteful number, since it uses less digits than its factorization.

1401611871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 801446.

The product of its (nonzero) digits is 1344, while the sum is 30.

The square root of 1401611871 is about 37438.1072037570. The cubic root of 1401611871 is about 1119.1181065297.

The spelling of 1401611871 in words is "one billion, four hundred one million, six hundred eleven thousand, eight hundred seventy-one".