1237401281 has 2 divisors, whose sum is σ = 1237401282. Its totient is φ = 1237401280.

The previous prime is 1237401257. The next prime is 1237401293. The reversal of 1237401281 is 1821047321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1127885056 + 109516225 = 33584^2 + 10465^2 .

It is an emirp because it is prime and its reverse (1821047321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1237401281 - 2²² = 1233206977 is a prime.

It is a super-2 number, since 2×1237401281² = 3062323860440881922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1237401211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 618700640 + 618700641.

It is an arithmetic number, because the mean of its divisors is an integer number (618700641).

Almost surely, 2^1237401281 is an apocalyptic number.

It is an amenable number.

1237401281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1237401281 is an equidigital number, since it uses as much as digits as its factorization.

1237401281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 1237401281 is about 35176.7150399238. The cubic root of 1237401281 is about 1073.5860352902.

The spelling of 1237401281 in words is "one billion, two hundred thirty-seven million, four hundred one thousand, two hundred eighty-one".