1046121561 has 14 divisors (see below), whose sum is σ = 1568465930. Its totient is φ = 697413888.

The previous prime is 1046121541. The next prime is 1046121607. The reversal of 1046121561 is 1651216401.

It can be written as a sum of positive squares in only one way, i.e., 770395536 + 275726025 = 27756^2 + 16605^2 .

It is not a de Polignac number, because 1046121561 - 2⁵ = 1046121529 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1046121511) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 716776 + ... + 718233.

Almost surely, 2^1046121561 is an apocalyptic number.

It is an amenable number.

1046121561 is a deficient number, since it is larger than the sum of its proper divisors (522344369).

1046121561 is an frugal number, since it uses more digits than its factorization.

1046121561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1435027 (or 1435012 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 1046121561 is about 32343.8025130008. The cubic root of 1046121561 is about 1015.1433743126.

Adding to 1046121561 its reverse (1651216401), we get a palindrome (2697337962).

The spelling of 1046121561 in words is "one billion, forty-six million, one hundred twenty-one thousand, five hundred sixty-one".