1249085901 has 24 divisors (see below), whose sum is σ = 1941832224. Its totient is φ = 712115040.

The previous prime is 1249085861. The next prime is 1249085953. The reversal of 1249085901 is 1095809421.

1249085901 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1249085901 - 2¹⁴ = 1249069517 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1249085901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1249080901) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55531 + ... + 74711.

It is an arithmetic number, because the mean of its divisors is an integer number (80909676).

Almost surely, 2^1249085901 is an apocalyptic number.

It is an amenable number.

1249085901 is a deficient number, since it is larger than the sum of its proper divisors (692746323).

1249085901 is a wasteful number, since it uses less digits than its factorization.

1249085901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19641 (or 19634 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 39.

The square root of 1249085901 is about 35342.4093830627. The cubic root of 1249085901 is about 1076.9546987702.

The spelling of 1249085901 in words is "one billion, two hundred forty-nine million, eighty-five thousand, nine hundred one".