1400012491 has 2 divisors, whose sum is σ = 1400012492. Its totient is φ = 1400012490.

The previous prime is 1400012479. The next prime is 1400012519. The reversal of 1400012491 is 1942100041.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1400012491 - 2²⁵ = 1366458059 is a prime.

It is not a weakly prime, because it can be changed into another prime (1400012291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700006245 + 700006246.

It is an arithmetic number, because the mean of its divisors is an integer number (700006246).

Almost surely, 2^1400012491 is an apocalyptic number.

1400012491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1400012491 is an equidigital number, since it uses as much as digits as its factorization.

1400012491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 1400012491 is about 37416.7407853757. The cubic root of 1400012491 is about 1118.6922691057.

The spelling of 1400012491 in words is "one billion, four hundred million, twelve thousand, four hundred ninety-one".