1011253249 has 4 divisors (see below), whose sum is σ = 1011372336. Its totient is φ = 1011134164.

The previous prime is 1011253219. The next prime is 1011253261. The reversal of 1011253249 is 9423521101.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9423521101 = 15331 ⋅614671.

It is a cyclic number.

It is not a de Polignac number, because 1011253249 - 2²³ = 1002864641 is a prime.

It is a super-2 number, since 2×1011253249² = 2045266267226112002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1011253219) 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, 45739 + ... + 64144.

It is an arithmetic number, because the mean of its divisors is an integer number (252843084).

It is a Proth number, since it is equal to 30861 ⋅ 2¹⁵ + 1 and 30861 < 2¹⁵.

Almost surely, 2^1011253249 is an apocalyptic number.

It is an amenable number.

1011253249 is a deficient number, since it is larger than the sum of its proper divisors (119087).

1011253249 is an equidigital number, since it uses as much as digits as its factorization.

1011253249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119086.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 1011253249 is about 31800.2083169277. The cubic root of 1011253249 is about 1003.7370996886.

The spelling of 1011253249 in words is "one billion, eleven million, two hundred fifty-three thousand, two hundred forty-nine".