1975138241 has 2 divisors, whose sum is σ = 1975138242. Its totient is φ = 1975138240.

The previous prime is 1975138237. The next prime is 1975138259. The reversal of 1975138241 is 1428315791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1465281841 + 509856400 = 38279^2 + 22580^2 .

It is a cyclic number.

It is not a de Polignac number, because 1975138241 - 2² = 1975138237 is a prime.

It is not a weakly prime, because it can be changed into another prime (1975138201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 987569120 + 987569121.

It is an arithmetic number, because the mean of its divisors is an integer number (987569121).

Almost surely, 2^1975138241 is an apocalyptic number.

It is an amenable number.

1975138241 is a deficient number, since it is larger than the sum of its proper divisors (1).

1975138241 is an equidigital number, since it uses as much as digits as its factorization.

1975138241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 41.

The square root of 1975138241 is about 44442.5273921275. The cubic root of 1975138241 is about 1254.6786246093.

The spelling of 1975138241 in words is "one billion, nine hundred seventy-five million, one hundred thirty-eight thousand, two hundred forty-one".