1451121541 has 2 divisors, whose sum is σ = 1451121542. Its totient is φ = 1451121540.

The previous prime is 1451121499. The next prime is 1451121587. The reversal of 1451121541 is 1451211541.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1007808516 + 443313025 = 31746^2 + 21055^2 .

It is a cyclic number.

It is not a de Polignac number, because 1451121541 - 2²¹ = 1449024389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1451121341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 725560770 + 725560771.

It is an arithmetic number, because the mean of its divisors is an integer number (725560771).

Almost surely, 2^1451121541 is an apocalyptic number.

It is an amenable number.

1451121541 is a deficient number, since it is larger than the sum of its proper divisors (1).

1451121541 is an equidigital number, since it uses as much as digits as its factorization.

1451121541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 800, while the sum is 25.

The square root of 1451121541 is about 38093.5892375607. The cubic root of 1451121541 is about 1132.1429408766.

Subtracting 1451121541 from its reverse (1451211541), we obtain a square (90000 = 300²).

The spelling of 1451121541 in words is "one billion, four hundred fifty-one million, one hundred twenty-one thousand, five hundred forty-one".