1541631420 has 192 divisors, whose sum is σ = 5503088640. Its totient is φ = 350977536.

The previous prime is 1541631409. The next prime is 1541631437. The reversal of 1541631420 is 241361451.

It is a happy number.

1541631420 is a `hidden beast` number, since 1 + 5 + 4 + 1 + 631 + 4 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1182489 + ... + 1183791.

It is an arithmetic number, because the mean of its divisors is an integer number (28661920).

Almost surely, 2^1541631420 is an apocalyptic number.

1541631420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1541631420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2751544320).

1541631420 is an abundant number, since it is smaller than the sum of its proper divisors (3961457220).

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

1541631420 is a wasteful number, since it uses less digits than its factorization.

1541631420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1641 (or 1633 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 1541631420 is about 39263.6144540973. The cubic root of 1541631420 is about 1155.2079908783.

Adding to 1541631420 its reverse (241361451), we get a palindrome (1782992871).

The spelling of 1541631420 in words is "one billion, five hundred forty-one million, six hundred thirty-one thousand, four hundred twenty".