1400258 has 4 divisors (see below), whose sum is σ = 2100390. Its totient is φ = 700128.

The previous prime is 1400251. The next prime is 1400261. The reversal of 1400258 is 8520041.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1261129 + 139129 = 1123^2 + 373^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1400251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 350063 + ... + 350066.

2^1400258 is an apocalyptic number.

1400258 is a deficient number, since it is larger than the sum of its proper divisors (700132).

1400258 is an equidigital number, since it uses as much as digits as its factorization.

1400258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700131.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 1400258 is about 1183.3249764963. The cubic root of 1400258 is about 111.8757657324.

Adding to 1400258 its reverse (8520041), we get a palindrome (9920299).

The spelling of 1400258 in words is "one million, four hundred thousand, two hundred fifty-eight".