1400270121 has 6 divisors (see below), whose sum is σ = 2022612410. Its totient is φ = 933513408.

The previous prime is 1400270111. The next prime is 1400270141. The reversal of 1400270121 is 1210720041.

It can be written as a sum of positive squares in only one way, i.e., 1334075625 + 66194496 = 36525^2 + 8136^2 .

It is not a de Polignac number, because 1400270121 - 2⁶ = 1400270057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1400270094 and 1400270103.

It is not an unprimeable number, because it can be changed into a prime (1400270111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 77792776 + ... + 77792793.

Almost surely, 2^1400270121 is an apocalyptic number.

It is an amenable number.

1400270121 is a deficient number, since it is larger than the sum of its proper divisors (622342289).

1400270121 is a wasteful number, since it uses less digits than its factorization.

1400270121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155585575 (or 155585572 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

The square root of 1400270121 is about 37420.1833373382. The cubic root of 1400270121 is about 1118.7608854012.

Adding to 1400270121 its reverse (1210720041), we get a palindrome (2610990162).

The spelling of 1400270121 in words is "one billion, four hundred million, two hundred seventy thousand, one hundred twenty-one".