1261250070 has 16 divisors (see below), whose sum is σ = 3027000240. Its totient is φ = 336333344.

The previous prime is 1261250059. The next prime is 1261250093. The reversal of 1261250070 is 700521621.

It is a self number, because there is not a number n which added to its sum of digits gives 1261250070.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21020805 + ... + 21020864.

It is an arithmetic number, because the mean of its divisors is an integer number (189187515).

Almost surely, 2^1261250070 is an apocalyptic number.

1261250070 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1261250070 is an abundant number, since it is smaller than the sum of its proper divisors (1765750170).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1261250070 is a wasteful number, since it uses less digits than its factorization.

1261250070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42041679.

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 1261250070 is about 35514.0826996841. The cubic root of 1261250070 is about 1080.4393702690.

Adding to 1261250070 its reverse (700521621), we get a palindrome (1961771691).

The spelling of 1261250070 in words is "one billion, two hundred sixty-one million, two hundred fifty thousand, seventy".