1037621561 has 2 divisors, whose sum is σ = 1037621562. Its totient is φ = 1037621560.

The previous prime is 1037621549. The next prime is 1037621579. The reversal of 1037621561 is 1651267301.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 899700025 + 137921536 = 29995^2 + 11744^2 .

It is a cyclic number.

It is not a de Polignac number, because 1037621561 - 2¹⁰ = 1037620537 is a prime.

It is not a weakly prime, because it can be changed into another prime (1037621531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 518810780 + 518810781.

It is an arithmetic number, because the mean of its divisors is an integer number (518810781).

Almost surely, 2^1037621561 is an apocalyptic number.

It is an amenable number.

1037621561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1037621561 is an equidigital number, since it uses as much as digits as its factorization.

1037621561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 1037621561 is about 32212.1337542237. The cubic root of 1037621561 is about 1012.3864624200.

Adding to 1037621561 its reverse (1651267301), we get a palindrome (2688888862).

The spelling of 1037621561 in words is "one billion, thirty-seven million, six hundred twenty-one thousand, five hundred sixty-one".