1200921149 has 8 divisors (see below), whose sum is σ = 1253558592. Its totient is φ = 1148319040.

The previous prime is 1200921143. The next prime is 1200921167. The reversal of 1200921149 is 9411290021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1200921149 - 2⁴ = 1200921133 is a prime.

It is a super-2 number, since 2×1200921149² = 2884423212230960402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200921143) 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, 79562 + ... + 93444.

It is an arithmetic number, because the mean of its divisors is an integer number (156694824).

Almost surely, 2^1200921149 is an apocalyptic number.

It is an amenable number.

1200921149 is a deficient number, since it is larger than the sum of its proper divisors (52637443).

1200921149 is a wasteful number, since it uses less digits than its factorization.

1200921149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17667.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 1200921149 is about 34654.3092414205. The cubic root of 1200921149 is about 1062.9304071042.

The spelling of 1200921149 in words is "one billion, two hundred million, nine hundred twenty-one thousand, one hundred forty-nine".