1231949 has 8 divisors (see below), whose sum is σ = 1330560. Its totient is φ = 1137136.

The previous prime is 1231943. The next prime is 1231961. The reversal of 1231949 is 9491321.

It is a happy number.

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 1231949 - 2¹⁶ = 1166413 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231943) 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, 257 + ... + 1590.

It is an arithmetic number, because the mean of its divisors is an integer number (166320).

2^1231949 is an apocalyptic number.

It is an amenable number.

1231949 is a deficient number, since it is larger than the sum of its proper divisors (98611).

1231949 is a wasteful number, since it uses less digits than its factorization.

1231949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1899.

The product of its digits is 1944, while the sum is 29.

The square root of 1231949 is about 1109.9319798979. The cubic root of 1231949 is about 107.2006889482.

The spelling of 1231949 in words is "one million, two hundred thirty-one thousand, nine hundred forty-nine".