1479781 has 2 divisors, whose sum is σ = 1479782. Its totient is φ = 1479780.

The previous prime is 1479773. The next prime is 1479791. The reversal of 1479781 is 1879741.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 893025 + 586756 = 945^2 + 766^2 .

It is a cyclic number.

It is not a de Polignac number, because 1479781 - 2³ = 1479773 is a prime.

It is a super-2 number, since 2×1479781² = 4379503615922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1479781.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1479721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 739890 + 739891.

It is an arithmetic number, because the mean of its divisors is an integer number (739891).

2^1479781 is an apocalyptic number.

It is an amenable number.

1479781 is a deficient number, since it is larger than the sum of its proper divisors (1).

1479781 is an equidigital number, since it uses as much as digits as its factorization.

1479781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14112, while the sum is 37.

The square root of 1479781 is about 1216.4624942841. The cubic root of 1479781 is about 113.9547630099.

It can be divided in two parts, 14797 and 81, that added together give a triangular number (14878 = T₁₇₂).

The spelling of 1479781 in words is "one million, four hundred seventy-nine thousand, seven hundred eighty-one".