1149621 has 12 divisors (see below), whose sum is σ = 1685376. Its totient is φ = 696520.

The previous prime is 1149619. The next prime is 1149637. The reversal of 1149621 is 1269411.

1149621 = 31² + 32² + ... + 151².

It is not a de Polignac number, because 1149621 - 2¹ = 1149619 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1149591 and 1149600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1149601) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1221 + ... + 1946.

It is an arithmetic number, because the mean of its divisors is an integer number (140448).

2^1149621 is an apocalyptic number.

1149621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1149621 is a deficient number, since it is larger than the sum of its proper divisors (535755).

1149621 is a wasteful number, since it uses less digits than its factorization.

1149621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3192 (or 3181 counting only the distinct ones).

The product of its digits is 432, while the sum is 24.

The square root of 1149621 is about 1072.2038052535. The cubic root of 1149621 is about 104.7574446514.

It can be divided in two parts, 1149 and 621, that added together give a triangular number (1770 = T₅₉).

The spelling of 1149621 in words is "one million, one hundred forty-nine thousand, six hundred twenty-one".