1400121269 has 2 divisors, whose sum is σ = 1400121270. Its totient is φ = 1400121268.

The previous prime is 1400121257. The next prime is 1400121367. The reversal of 1400121269 is 9621210041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1277133169 + 122988100 = 35737^2 + 11090^2 .

It is an emirp because it is prime and its reverse (9621210041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1400121269 - 2²⁰ = 1399072693 is a prime.

It is a super-2 number, since 2×1400121269² = 3920679135812340722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1400121209) 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 as a sum of consecutive naturals, namely, 700060634 + 700060635.

It is an arithmetic number, because the mean of its divisors is an integer number (700060635).

Almost surely, 2^1400121269 is an apocalyptic number.

It is an amenable number.

1400121269 is a deficient number, since it is larger than the sum of its proper divisors (1).

1400121269 is an equidigital number, since it uses as much as digits as its factorization.

1400121269 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 1400121269 is about 37418.1943578254. The cubic root of 1400121269 is about 1118.7212416939.

The spelling of 1400121269 in words is "one billion, four hundred million, one hundred twenty-one thousand, two hundred sixty-nine".