1115901421 has 2 divisors, whose sum is σ = 1115901422. Its totient is φ = 1115901420.

The previous prime is 1115901383. The next prime is 1115901443. The reversal of 1115901421 is 1241095111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1115894025 + 7396 = 33405^2 + 86^2 .

It is a cyclic number.

It is not a de Polignac number, because 1115901421 - 2¹¹ = 1115899373 is a prime.

It is a super-3 number, since 3×1115901421³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1115901221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 557950710 + 557950711.

It is an arithmetic number, because the mean of its divisors is an integer number (557950711).

Almost surely, 2^1115901421 is an apocalyptic number.

It is an amenable number.

1115901421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1115901421 is an equidigital number, since it uses as much as digits as its factorization.

1115901421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 25.

The square root of 1115901421 is about 33405.1107018073. The cubic root of 1115901421 is about 1037.2304953637.

Adding to 1115901421 its reverse (1241095111), we get a palindrome (2356996532).

The spelling of 1115901421 in words is "one billion, one hundred fifteen million, nine hundred one thousand, four hundred twenty-one".