1145201090 has 32 divisors (see below), whose sum is σ = 2381042304. Its totient is φ = 391939840.

The previous prime is 1145201089. The next prime is 1145201093. The reversal of 1145201090 is 901025411.

It is a happy number.

It is a super-2 number, since 2×1145201090² = 2622971073074376200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1145201093) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 304334 + ... + 308073.

It is an arithmetic number, because the mean of its divisors is an integer number (74407572).

Almost surely, 2^1145201090 is an apocalyptic number.

1145201090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1145201090 is an abundant number, since it is smaller than the sum of its proper divisors (1235841214).

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

1145201090 is a wasteful number, since it uses less digits than its factorization.

1145201090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612442.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 1145201090 is about 33840.8198777748. The cubic root of 1145201090 is about 1046.2301973169.

The spelling of 1145201090 in words is "one billion, one hundred forty-five million, two hundred one thousand, ninety".