1201953858 has 32 divisors (see below), whose sum is σ = 2752189440. Its totient is φ = 342807120.

The previous prime is 1201953853. The next prime is 1201953871. The reversal of 1201953858 is 8583591021.

It is a super-2 number, since 2×1201953858² = 2889386153522168328, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1201953853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1078 + ... + 49041.

It is an arithmetic number, because the mean of its divisors is an integer number (86005920).

Almost surely, 2^1201953858 is an apocalyptic number.

1201953858 is an abundant number, since it is smaller than the sum of its proper divisors (1550235582).

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

1201953858 is a wasteful number, since it uses less digits than its factorization.

1201953858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50702.

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

The square root of 1201953858 is about 34669.2061922392. The cubic root of 1201953858 is about 1063.2350019843.

The spelling of 1201953858 in words is "one billion, two hundred one million, nine hundred fifty-three thousand, eight hundred fifty-eight".