1012249391 has 8 divisors (see below), whose sum is σ = 1019788704. Its totient is φ = 1004738560.

The previous prime is 1012249373. The next prime is 1012249393. The reversal of 1012249391 is 1939422101.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1012249391 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 (1012249393) 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, 67055 + ... + 80751.

It is an arithmetic number, because the mean of its divisors is an integer number (127473588).

Almost surely, 2^1012249391 is an apocalyptic number.

1012249391 is a deficient number, since it is larger than the sum of its proper divisors (7539313).

1012249391 is a wasteful number, since it uses less digits than its factorization.

1012249391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14241.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 1012249391 is about 31815.8669691712. The cubic root of 1012249391 is about 1004.0665709180.

The spelling of 1012249391 in words is "one billion, twelve million, two hundred forty-nine thousand, three hundred ninety-one".