1012150261 has 4 divisors (see below), whose sum is σ = 1012719712. Its totient is φ = 1011580812.

The previous prime is 1012150253. The next prime is 1012150277. The reversal of 1012150261 is 1620512101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1012150261 - 2³ = 1012150253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012150201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 282051 + ... + 285616.

It is an arithmetic number, because the mean of its divisors is an integer number (253179928).

Almost surely, 2^1012150261 is an apocalyptic number.

It is an amenable number.

1012150261 is a deficient number, since it is larger than the sum of its proper divisors (569451).

1012150261 is an equidigital number, since it uses as much as digits as its factorization.

1012150261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569450.

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 1012150261 is about 31814.3090605470. The cubic root of 1012150261 is about 1004.0337936303.

Adding to 1012150261 its reverse (1620512101), we get a palindrome (2632662362).

The spelling of 1012150261 in words is "one billion, twelve million, one hundred fifty thousand, two hundred sixty-one".