1245441930 has 64 divisors (see below), whose sum is σ = 3193043328. Its totient is φ = 309800960.

The previous prime is 1245441877. The next prime is 1245441943. The reversal of 1245441930 is 391445421.

It is a super-2 number, since 2×1245441930² = 3102251202004249800, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1245441891 and 1245441900.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46825 + ... + 68435.

It is an arithmetic number, because the mean of its divisors is an integer number (49891302).

Almost surely, 2^1245441930 is an apocalyptic number.

1245441930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1245441930 is the 28815-th pentagonal number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1245441930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1596521664).

1245441930 is an abundant number, since it is smaller than the sum of its proper divisors (1947601398).

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

1245441930 is a wasteful number, since it uses less digits than its factorization.

1245441930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21751.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 1245441930 is about 35290.8193444131. The cubic root of 1245441930 is about 1075.9064084145.

The spelling of 1245441930 in words is "one billion, two hundred forty-five million, four hundred forty-one thousand, nine hundred thirty".