1201269390 has 16 divisors (see below), whose sum is σ = 2883046608. Its totient is φ = 320338496.

The previous prime is 1201269383. The next prime is 1201269397. The reversal of 1201269390 is 939621021.

It is an interprime number because it is at equal distance from previous prime (1201269383) and next prime (1201269397).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201269397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20021127 + ... + 20021186.

It is an arithmetic number, because the mean of its divisors is an integer number (180190413).

Almost surely, 2^1201269390 is an apocalyptic number.

1201269390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1201269390 is an abundant number, since it is smaller than the sum of its proper divisors (1681777218).

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

1201269390 is a wasteful number, since it uses less digits than its factorization.

1201269390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40042323.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 1201269390 is about 34659.3333750088. Note that the first 4 decimals coincide. The cubic root of 1201269390 is about 1063.0331394040.

The spelling of 1201269390 in words is "one billion, two hundred one million, two hundred sixty-nine thousand, three hundred ninety".