1380621 has 32 divisors (see below), whose sum is σ = 2239488. Its totient is φ = 746240.

The previous prime is 1380619. The next prime is 1380623. The reversal of 1380621 is 1260831.

It is an interprime number because it is at equal distance from previous prime (1380619) and next prime (1380623).

It is not a de Polignac number, because 1380621 - 2¹ = 1380619 is a prime.

It is a super-2 number, since 2×1380621² = 3812228691282, which contains 22 as substring.

1380621 is a modest number, since divided by 621 gives 138 as remainder.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1380623) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12850 + ... + 12956.

It is an arithmetic number, because the mean of its divisors is an integer number (69984).

2^1380621 is an apocalyptic number.

1380621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1380621 is a deficient number, since it is larger than the sum of its proper divisors (858867).

1380621 is a wasteful number, since it uses less digits than its factorization.

1380621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 1380621 is about 1174.9982978711. The cubic root of 1380621 is about 111.3503256919.

The spelling of 1380621 in words is "one million, three hundred eighty thousand, six hundred twenty-one".