1242401401 has 2 divisors, whose sum is σ = 1242401402. Its totient is φ = 1242401400.

The previous prime is 1242401399. The next prime is 1242401411. The reversal of 1242401401 is 1041042421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1230325776 + 12075625 = 35076^2 + 3475^2 .

It is an emirp because it is prime and its reverse (1041042421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1242401401 - 2¹ = 1242401399 is a prime.

It is a super-2 number, since 2×1242401401² = 3087122482413525602, which contains 22 as substring.

Together with 1242401399, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1242401411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621200700 + 621200701.

It is an arithmetic number, because the mean of its divisors is an integer number (621200701).

Almost surely, 2^1242401401 is an apocalyptic number.

It is an amenable number.

1242401401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242401401 is an equidigital number, since it uses as much as digits as its factorization.

1242401401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 1242401401 is about 35247.7148337307. The cubic root of 1242401401 is about 1075.0301490733.

Adding to 1242401401 its reverse (1041042421), we get a palindrome (2283443822).

The spelling of 1242401401 in words is "one billion, two hundred forty-two million, four hundred one thousand, four hundred one".