1401786 has 40 divisors (see below), whose sum is σ = 3332340. Its totient is φ = 438912.

The previous prime is 1401767. The next prime is 1401791. The reversal of 1401786 is 6871041.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1265625 + 136161 = 1125^2 + 369^2 .

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2500 + ... + 3008.

2^1401786 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1401786, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1666170).

1401786 is an abundant number, since it is smaller than the sum of its proper divisors (1930554).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1401786 is a wasteful number, since it uses less digits than its factorization.

1401786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540 (or 531 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 1401786 is about 1183.9704388202. The cubic root of 1401786 is about 111.9164449090.

It can be divided in two parts, 1401 and 786, that added together give a 7-th power (2187 = 3⁷).

The spelling of 1401786 in words is "one million, four hundred one thousand, seven hundred eighty-six".