1245245421 has 8 divisors (see below), whose sum is σ = 1897516864. Its totient is φ = 711568800.

The previous prime is 1245245381. The next prime is 1245245453. The reversal of 1245245421 is 1245425421.

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

It is not a de Polignac number, because 1245245421 - 2¹⁰ = 1245244397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245245021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29648680 + ... + 29648721.

It is an arithmetic number, because the mean of its divisors is an integer number (237189608).

Almost surely, 2^1245245421 is an apocalyptic number.

It is an amenable number.

1245245421 is a deficient number, since it is larger than the sum of its proper divisors (652271443).

1245245421 is an equidigital number, since it uses as much as digits as its factorization.

1245245421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59297411.

The product of its digits is 12800, while the sum is 30.

The square root of 1245245421 is about 35288.0350968993. The cubic root of 1245245421 is about 1075.8498190203.

The spelling of 1245245421 in words is "one billion, two hundred forty-five million, two hundred forty-five thousand, four hundred twenty-one".