1253851890 has 16 divisors (see below), whose sum is σ = 3009244608. Its totient is φ = 334360496.

The previous prime is 1253851883. The next prime is 1253851891. The reversal of 1253851890 is 981583521.

It is not an unprimeable number, because it can be changed into a prime (1253851891) 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, 20897502 + ... + 20897561.

It is an arithmetic number, because the mean of its divisors is an integer number (188077788).

Almost surely, 2^1253851890 is an apocalyptic number.

1253851890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1253851890 is an abundant number, since it is smaller than the sum of its proper divisors (1755392718).

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

1253851890 is a wasteful number, since it uses less digits than its factorization.

1253851890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41795073.

The product of its (nonzero) digits is 86400, while the sum is 42.

The square root of 1253851890 is about 35409.7711091162. The cubic root of 1253851890 is about 1078.3226964661.

The spelling of 1253851890 in words is "one billion, two hundred fifty-three million, eight hundred fifty-one thousand, eight hundred ninety".