1402381 has 4 divisors (see below), whose sum is σ = 1484892. Its totient is φ = 1319872.

The previous prime is 1402369. The next prime is 1402391. The reversal of 1402381 is 1832041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1832041 = 467 ⋅3923.

It can be written as a sum of positive squares in 2 ways, for example, as 469225 + 933156 = 685^2 + 966^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1402381 is a prime.

It is a super-2 number, since 2×1402381² = 3933344938322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1402301) 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, 41230 + ... + 41263.

It is an arithmetic number, because the mean of its divisors is an integer number (371223).

2^1402381 is an apocalyptic number.

It is an amenable number.

1402381 is a deficient number, since it is larger than the sum of its proper divisors (82511).

1402381 is an equidigital number, since it uses as much as digits as its factorization.

1402381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82510.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1402381 is about 1184.2216853275. The cubic root of 1402381 is about 111.9322772984.

The spelling of 1402381 in words is "one million, four hundred two thousand, three hundred eighty-one".