1541631 has 16 divisors (see below), whose sum is σ = 2530304. Its totient is φ = 813024.

The previous prime is 1541629. The next prime is 1541651. The reversal of 1541631 is 1361451.

It is not a de Polignac number, because 1541631 - 2¹ = 1541629 is a prime.

It is a super-2 number, since 2×1541631² = 4753252280322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 1541598 and 1541607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1541651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2551 + ... + 3096.

It is an arithmetic number, because the mean of its divisors is an integer number (158144).

2^1541631 is an apocalyptic number.

1541631 is a deficient number, since it is larger than the sum of its proper divisors (988673).

1541631 is a wasteful number, since it uses less digits than its factorization.

1541631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5670.

The product of its digits is 360, while the sum is 21.

The square root of 1541631 is about 1241.6243393233. The cubic root of 1541631 is about 115.5207885971.

The spelling of 1541631 in words is "one million, five hundred forty-one thousand, six hundred thirty-one".