1254770861 has 4 divisors (see below), whose sum is σ = 1268869500. Its totient is φ = 1240672224.

The previous prime is 1254770827. The next prime is 1254770879. The reversal of 1254770861 is 1680774521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1680774521 = 5701 ⋅294821.

It can be written as a sum of positive squares in 2 ways, for example, as 307300900 + 947469961 = 17530^2 + 30781^2 .

It is a cyclic number.

It is not a de Polignac number, because 1254770861 - 2¹⁴ = 1254754477 is a prime.

It is a super-2 number, since 2×1254770861² = 3148899827229362642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1254770821) 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, 7049186 + ... + 7049363.

It is an arithmetic number, because the mean of its divisors is an integer number (317217375).

Almost surely, 2^1254770861 is an apocalyptic number.

It is an amenable number.

1254770861 is a deficient number, since it is larger than the sum of its proper divisors (14098639).

1254770861 is an equidigital number, since it uses as much as digits as its factorization.

1254770861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14098638.

The product of its (nonzero) digits is 94080, while the sum is 41.

The square root of 1254770861 is about 35422.7449670406. The cubic root of 1254770861 is about 1078.5860729458.

The spelling of 1254770861 in words is "one billion, two hundred fifty-four million, seven hundred seventy thousand, eight hundred sixty-one".