1401145 has 4 divisors (see below), whose sum is σ = 1681380. Its totient is φ = 1120912.

The previous prime is 1401139. The next prime is 1401151. The reversal of 1401145 is 5411041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5411041 = 229 ⋅23629.

It is an interprime number because it is at equal distance from previous prime (1401139) and next prime (1401151).

It can be written as a sum of positive squares in 2 ways, for example, as 1008016 + 393129 = 1004^2 + 627^2 .

It is a cyclic number.

It is not a de Polignac number, because 1401145 - 2⁷ = 1401017 is a prime.

It is a super-2 number, since 2×1401145² = 3926414622050, which contains 22 as substring.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140110 + ... + 140119.

It is an arithmetic number, because the mean of its divisors is an integer number (420345).

2^1401145 is an apocalyptic number.

It is an amenable number.

1401145 is a deficient number, since it is larger than the sum of its proper divisors (280235).

1401145 is an equidigital number, since it uses as much as digits as its factorization.

1401145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280234.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 1401145 is about 1183.6997085410. The cubic root of 1401145 is about 111.8993834891.

Adding to 1401145 its reverse (5411041), we get a palindrome (6812186).

The spelling of 1401145 in words is "one million, four hundred one thousand, one hundred forty-five".