1400350421 has 2 divisors, whose sum is σ = 1400350422. Its totient is φ = 1400350420.

The previous prime is 1400350397. The next prime is 1400350489. The reversal of 1400350421 is 1240530041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1381980625 + 18369796 = 37175^2 + 4286^2 .

It is an emirp because it is prime and its reverse (1240530041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1400350421 - 2¹⁴ = 1400334037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1400350393 and 1400350402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1400350621) 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, 700175210 + 700175211.

It is an arithmetic number, because the mean of its divisors is an integer number (700175211).

Almost surely, 2^1400350421 is an apocalyptic number.

It is an amenable number.

1400350421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1400350421 is an equidigital number, since it uses as much as digits as its factorization.

1400350421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1400350421 is about 37421.2562723381. The cubic root of 1400350421 is about 1118.7822705089.

Adding to 1400350421 its reverse (1240530041), we get a palindrome (2640880462).

The spelling of 1400350421 in words is "one billion, four hundred million, three hundred fifty thousand, four hundred twenty-one".