1245001044 has 48 divisors (see below), whose sum is σ = 3427106816. Its totient is φ = 344239200.

The previous prime is 1245000997. The next prime is 1245001073. The reversal of 1245001044 is 4401005421.

It is a happy number.

It is a super-2 number, since 2×1245001044² = 3100055199122179872, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 1245001044.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 236452 + ... + 241659.

Almost surely, 2^1245001044 is an apocalyptic number.

1245001044 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1245001044 is an abundant number, since it is smaller than the sum of its proper divisors (2182105772).

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

1245001044 is a wasteful number, since it uses less digits than its factorization.

1245001044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478156 (or 478154 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 1245001044 is about 35284.5723227589. The cubic root of 1245001044 is about 1075.7794366021.

Adding to 1245001044 its reverse (4401005421), we get a palindrome (5646006465).

The spelling of 1245001044 in words is "one billion, two hundred forty-five million, one thousand, forty-four".