1249023830 has 16 divisors (see below), whose sum is σ = 2380492800. Its totient is φ = 470220672.

The previous prime is 1249023803. The next prime is 1249023833. The reversal of 1249023830 is 383209421.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1249023833) 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, 3673430 + ... + 3673769.

It is an arithmetic number, because the mean of its divisors is an integer number (148780800).

Almost surely, 2^1249023830 is an apocalyptic number.

1249023830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1249023830 is a deficient number, since it is larger than the sum of its proper divisors (1131468970).

1249023830 is a wasteful number, since it uses less digits than its factorization.

1249023830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7347223.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 1249023830 is about 35341.5312345122. The cubic root of 1249023830 is about 1076.9368593880.

The spelling of 1249023830 in words is "one billion, two hundred forty-nine million, twenty-three thousand, eight hundred thirty".