1253022421 has 8 divisors (see below), whose sum is σ = 1436632704. Its totient is φ = 1070563920.

The previous prime is 1253022389. The next prime is 1253022439. The reversal of 1253022421 is 1242203521.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1253022421 - 2⁵ = 1253022389 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1253022392 and 1253022401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1253022461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 285610 + ... + 289963.

It is an arithmetic number, because the mean of its divisors is an integer number (179579088).

Almost surely, 2^1253022421 is an apocalyptic number.

It is an amenable number.

1253022421 is a deficient number, since it is larger than the sum of its proper divisors (183610283).

1253022421 is an equidigital number, since it uses as much as digits as its factorization.

1253022421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575891.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 1253022421 is about 35398.0567404483. The cubic root of 1253022421 is about 1078.0848606785.

Adding to 1253022421 its reverse (1242203521), we get a palindrome (2495225942).

The spelling of 1253022421 in words is "one billion, two hundred fifty-three million, twenty-two thousand, four hundred twenty-one".