1251620023 has 2 divisors, whose sum is σ = 1251620024. Its totient is φ = 1251620022.

The previous prime is 1251620017. The next prime is 1251620033. The reversal of 1251620023 is 3200261521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1251620023 - 2⁵ = 1251619991 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1251619976 and 1251620003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1251620033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625810011 + 625810012.

It is an arithmetic number, because the mean of its divisors is an integer number (625810012).

Almost surely, 2^1251620023 is an apocalyptic number.

1251620023 is a deficient number, since it is larger than the sum of its proper divisors (1).

1251620023 is an equidigital number, since it uses as much as digits as its factorization.

1251620023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1251620023 is about 35378.2422259784. The cubic root of 1251620023 is about 1077.6825086202.

Adding to 1251620023 its reverse (3200261521), we get a palindrome (4451881544).

The spelling of 1251620023 in words is "one billion, two hundred fifty-one million, six hundred twenty thousand, twenty-three".