1245739420 has 24 divisors (see below), whose sum is σ = 2617524000. Its totient is φ = 498015552.

The previous prime is 1245739349. The next prime is 1245739477. The reversal of 1245739420 is 249375421.

It is a self number, because there is not a number n which added to its sum of digits gives 1245739420.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21006 + ... + 54154.

It is an arithmetic number, because the mean of its divisors is an integer number (109063500).

Almost surely, 2^1245739420 is an apocalyptic number.

1245739420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1245739420 is an abundant number, since it is smaller than the sum of its proper divisors (1371784580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1245739420 is a wasteful number, since it uses less digits than its factorization.

1245739420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35037 (or 35035 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 1245739420 is about 35295.0339283022. The cubic root of 1245739420 is about 1075.9920663401.

The spelling of 1245739420 in words is "one billion, two hundred forty-five million, seven hundred thirty-nine thousand, four hundred twenty".