1201023457 has 2 divisors, whose sum is σ = 1201023458. Its totient is φ = 1201023456.

The previous prime is 1201023443. The next prime is 1201023479. The reversal of 1201023457 is 7543201021.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1188801441 + 12222016 = 34479^2 + 3496^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1201023457 is a prime.

It is not a weakly prime, because it can be changed into another prime (1201023437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600511728 + 600511729.

It is an arithmetic number, because the mean of its divisors is an integer number (600511729).

Almost surely, 2^1201023457 is an apocalyptic number.

It is an amenable number.

1201023457 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201023457 is an equidigital number, since it uses as much as digits as its factorization.

1201023457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 1201023457 is about 34655.7853323222. The cubic root of 1201023457 is about 1062.9605903782.

Adding to 1201023457 its reverse (7543201021), we get a palindrome (8744224478).

The spelling of 1201023457 in words is "one billion, two hundred one million, twenty-three thousand, four hundred fifty-seven".